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 A097411 #8 Feb 16 2025 08:32:54
%S A097411 1,1,2,1,7,2,8,2,4,1,1,3,6,1,1,2,4,6,8,1,1,2,3,4,6,8,1,1,1,2,2,3,4,5,
%T A097411 6,7,9,1,1,1,1,2,2,3,3,4,5,5,6,7,8,1,1,1,1,1,1,2,2,2,3,3,3,4,4,5,6,6,
%U A097411 7,8,9,1,1,1,1,1,1,1,1,2,2,2,2,2,3,3,3,4,4,4,5,5,6,6,6,7,8,8,9,1,1,1,1
%N A097411 Initial decimal digit of n^7.
%H A097411 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GelfandsQuestion.html">Gelfand's Question</a>
%e A097411 1, 128, 2187, 16384, 78125, 279936, 823543, 2097152, 4782969, 10000000, ...
%t A097411 Table[First[IntegerDigits[n^7]],{n,110}] (* _Harvey P. Dale_, Mar 17 2019 *)
%Y A097411 Cf. A000027, A002993, A002994, A097408, A097409, A097410, A097412, A097413, A097414.
%K A097411 nonn,base,easy
%O A097411 1,3
%A A097411 _Eric W. Weisstein_, Aug 16 2004
%E A097411 1 prepended by _Harvey P. Dale_, Mar 17 2019