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 A293986 #9 Oct 21 2017 15:42:26
%S A293986 1,1,9,97,1249,19041,338281,6872929,156878337,3964344769,109649487241,
%T A293986 3290138609121,106344130171489,3680908100971297,135759417307847529,
%U A293986 5312294503297893601,219710817062641086721,9572694339517999983489,438078249108592685152777
%N A293986 E.g.f.: exp((1/(1-x)^7 - 1)/7).
%H A293986 Seiichi Manyama, <a href="/A293986/b293986.txt">Table of n, a(n) for n = 0..404</a>
%o A293986 (PARI) N=66; x='x+O('x^N); Vec(serlaplace(exp((1/(1-x)^7-1)/7)))
%Y A293986 Column k=8 of A291709.
%K A293986 nonn
%O A293986 0,3
%A A293986 _Seiichi Manyama_, Oct 21 2017