A371838 - OEIS

%I #27 Apr 08 2024 15:42:55

%S 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 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 8,3,6,7,5,3,4,7,8,4,6,0,3,6,8,8,0,1,3

%N Decimal expansion of 666^666, the Legion's number of the first kind.

%C This number has 1881 digits and contains two nonoverlapping 666 substrings.

%H Paolo Xausa, <a href="/A371838/b371838.txt">Table of n, a(n) for n = 1881..3761</a>

%H Brady Haran and Tony Padilla, <a href="https://www.youtube.com/watch?v=UbfLl0IxL9o">Goliath & Leviathan Numbers</a>, YouTube Numberphile video, 2024.

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LegionsNumbers.html">Legion's Numbers</a>.

%e 2715417592887128558260874551700217860278385210650169871782230046965783675...

%t IntegerDigits[666^666][[;;100]]

%o (Python)

%o afull = list(map(int, str(666**666))) # _Michael S. Branicky_, Apr 08 2024

%o (PARI) digits(666^666) \\ _Michel Marcus_, Apr 08 2024

%Y Cf. A007356, A051003, A115983.

%K nonn,easy,cons,fini,full

%O 1881,1

%A _Paolo Xausa_, Apr 08 2024