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 A292311 #12 Sep 16 2017 17:10:56
%S A292311 1,-1,-3,-24,-216,-2801,-42166,-762397,-15685040,-366477168,
%T A292311 -9523974486,-273453483050,-8583651341879,-292700900034984,
%U A292311 -10770969729108326,-425541512224476567,-17964544188354355022,-807097409926675847400
%N A292311 Expansion of Product_{k>=1} 1/(1 + k^k*x^k).
%H A292311 Seiichi Manyama, <a href="/A292311/b292311.txt">Table of n, a(n) for n = 0..386</a>
%F A292311 Convolution inverse of A265949.
%F A292311 a(n) ~ -n^n * (1 - exp(-1)/n - (exp(-1)/2 + 3*exp(-2))/n^2). - _Vaclav Kotesovec_, Sep 14 2017
%o A292311 (PARI) {a(n) = polcoeff(1/prod(k=1, n, 1+k^k*x^k+x*O(x^n)), n)}
%Y A292311 Cf. A023882, A265949.
%K A292311 sign
%O A292311 0,3
%A A292311 _Seiichi Manyama_, Sep 14 2017