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 A368446 #9 Dec 25 2023 10:01:46
%S A368446 1,1,9,81,1025,16177,306793,6791201,171849153,4892782241,154792866953,
%T A368446 5387090968113,204528939571521,8412441383512657,372629008281155177,
%U A368446 17684630326318986881,895251144144309285505,48152984520621412552257
%N A368446 Expansion of e.g.f. exp(-x) / (1 + log(1 - 2*x)).
%F A368446 a(n) = (-1)^n + Sum_{k=1..n} 2^k * (k-1)! * binomial(n,k) * a(n-k).
%o A368446 (PARI) a_vector(n) = my(v=vector(n+1)); for(i=0, n, v[i+1]=(-1)^i+sum(j=1, i, 2^j*(j-1)!*binomial(i, j)*v[i-j+1])); v;
%Y A368446 Cf. A330149, A368447.
%Y A368446 Cf. A368286.
%K A368446 nonn
%O A368446 0,3
%A A368446 _Seiichi Manyama_, Dec 24 2023