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 A367876 #10 Dec 04 2023 06:37:34
%S A367876 1,1,-1,-8,-15,46,445,1240,-4319,-63782,-282219,474508,16681489,
%T A367876 119013142,137086573,-6217558664,-73971468351,-333213031502,
%U A367876 2327570156197,58209718600324,509023624616881,613709076338926,-48850389688059651,-773649504707845328
%N A367876 Expansion of e.g.f. exp(x * (2 - exp(x))).
%F A367876 G.f.: Sum_{k>=0} (-x)^k / (1 - (k+2)*x)^(k+1).
%F A367876 a(n) = Sum_{k=0..n} (-1)^k * (k+2)^(n-k) * binomial(n,k).
%o A367876 (PARI) a(n) = sum(k=0, n, (-1)^k*(k+2)^(n-k)*binomial(n, k));
%Y A367876 Cf. A367874, A367877.
%K A367876 sign,easy
%O A367876 0,4
%A A367876 _Seiichi Manyama_, Dec 03 2023