\begin{array}{||c|c||}
\hline
\mbox{(double)}\,a_n & a_{n-1}-a_n\\
\hline\hline 6 & \\
\hline 5.79999999999999982236431605997495353221893310546875 & 0.20000000000000017763568394002504646778106689453125\\
\hline 5.5999999999999996447286321199499070644378662109375 & 0.20000000000000017763568394002504646778106689453125\\
\hline 5.39999999999999946709294817992486059665679931640625 & 0.20000000000000017763568394002504646778106689453125\\
\hline 5.199999999999999289457264239899814128875732421875 & 0.20000000000000017763568394002504646778106689453125\\
\hline 4.99999999999999911182158029987476766109466552734375 & 0.20000000000000017763568394002504646778106689453125\\
\hline 4.7999999999999989341858963598497211933135986328125 & 0.20000000000000017763568394002504646778106689453125\\
\hline 4.59999999999999875655021241982467472553253173828125 & 0.20000000000000017763568394002504646778106689453125\\
\hline 4.39999999999999857891452847979962825775146484375 & 0.20000000000000017763568394002504646778106689453125\\
\hline 4.19999999999999840127884453977458178997039794921875 & 0.20000000000000017763568394002504646778106689453125\\
\hline 3.9999999999999982236431605997495353221893310546875 & 0.20000000000000017763568394002504646778106689453125\\
\hline 3.79999999999999804600747665972448885440826416015625 & 0.20000000000000017763568394002504646778106689453125\\
\hline 3.599999999999997868371792719699442386627197265625 & 0.20000000000000017763568394002504646778106689453125\\
\hline 3.39999999999999769073610877967439591884613037109375 & 0.20000000000000017763568394002504646778106689453125\\
\hline 3.1999999999999975131004248396493494510650634765625 & 0.20000000000000017763568394002504646778106689453125\\
\hline 2.99999999999999733546474089962430298328399658203125 & 0.20000000000000017763568394002504646778106689453125\\
\hline 2.7999999999999971578290569595992565155029296875 & 0.20000000000000017763568394002504646778106689453125\\
\hline 2.59999999999999698019337301957421004772186279296875 & 0.20000000000000017763568394002504646778106689453125\\
\hline 2.3999999999999968025576890795491635799407958984375 & 0.20000000000000017763568394002504646778106689453125\\
\hline 2.19999999999999662492200513952411711215972900390625 & 0.20000000000000017763568394002504646778106689453125\\
\hline 1.9999999999999966693309261245303787291049957275390625 & 0.1999999999999999555910790149937383830547332763671875\\
\hline 1.799999999999996713739847109536640346050262451171875 & 0.1999999999999999555910790149937383830547332763671875\\
\hline 1.5999999999999967581487680945429019629955291748046875 & 0.1999999999999999555910790149937383830547332763671875\\
\hline 1.3999999999999968025576890795491635799407958984375 & 0.1999999999999999555910790149937383830547332763671875\\
\hline 1.1999999999999968469666100645554251968860626220703125 & 0.1999999999999999555910790149937383830547332763671875\\
\hline 0.999999999999996891375531049561686813831329345703125 & 0.1999999999999999555910790149937383830547332763671875\\
\hline 0.7999999999999969357844520345679484307765960693359375 & 0.1999999999999999555910790149937383830547332763671875\\
\hline 0.59999999999999698019337301957421004772186279296875 & 0.1999999999999999555910790149937383830547332763671875\\
\hline 0.399999999999996969091142773322644643485546112060546875 & 0.200000000000000011102230246251565404236316680908203125\\
\hline 0.19999999999999695798891252707107923924922943115234375 & 0.200000000000000011102230246251565404236316680908203125\\
\hline -0.000000000000003053113317719180486164987087249755859375 & 0.200000000000000011102230246251565404236316680908203125\\
\hline
\end{array}