This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A371838 #27 Apr 08 2024 15:42:55 %S A371838 2,7,1,5,4,1,7,5,9,2,8,8,7,1,2,8,5,5,8,2,6,0,8,7,4,5,5,1,7,0,0,2,1,7, %T A371838 8,6,0,2,7,8,3,8,5,2,1,0,6,5,0,1,6,9,8,7,1,7,8,2,2,3,0,0,4,6,9,6,5,7, %U A371838 8,3,6,7,5,3,4,7,8,4,6,0,3,6,8,8,0,1,3 %N A371838 Decimal expansion of 666^666, the Legion's number of the first kind. %C A371838 This number has 1881 digits and contains two nonoverlapping 666 substrings. %H A371838 Paolo Xausa, <a href="/A371838/b371838.txt">Table of n, a(n) for n = 1881..3761</a> %H A371838 Brady Haran and Tony Padilla, <a href="https://www.youtube.com/watch?v=UbfLl0IxL9o">Goliath & Leviathan Numbers</a>, YouTube Numberphile video, 2024. %H A371838 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LegionsNumbers.html">Legion's Numbers</a>. %e A371838 2715417592887128558260874551700217860278385210650169871782230046965783675... %t A371838 IntegerDigits[666^666][[;;100]] %o A371838 (Python) %o A371838 afull = list(map(int, str(666**666))) # _Michael S. Branicky_, Apr 08 2024 %o A371838 (PARI) digits(666^666) \\ _Michel Marcus_, Apr 08 2024 %Y A371838 Cf. A007356, A051003, A115983. %K A371838 nonn,easy,cons,fini,full %O A371838 1881,1 %A A371838 _Paolo Xausa_, Apr 08 2024