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 A292907 #18 Sep 28 2017 06:45:47
%S A292907 1,0,2,-6,24,-140,870,-5922,45416,-381096,3442410,-33382910,345803172,
%T A292907 -3801763836,44156760830,-539962736250,6929042527920,-93032248209872,
%U A292907 1303556965679826,-19018807375195638,288341417011487420,-4534168069704168420
%N A292907 E.g.f.: exp(x^2 * exp(-x)).
%H A292907 Seiichi Manyama, <a href="/A292907/b292907.txt">Table of n, a(n) for n = 0..516</a>
%F A292907 a(n) = (-1)^n * A216507(n).
%o A292907 (PARI) x='x+O('x^66); Vec(serlaplace(exp(x^2*exp(-x))))
%Y A292907 Column k=2 of A292973.
%Y A292907 Cf. A216507.
%K A292907 sign
%O A292907 0,3
%A A292907 _Seiichi Manyama_, Sep 26 2017