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 A367852 #9 Dec 03 2023 01:43:54
%S A367852 1,2,11,102,1320,21804,436986,10283580,277697304,8458929792,
%T A367852 286825214592,10712216384352,436859348261904,19313926491051360,
%U A367852 920053448561989296,46977842202096405024,2559387620091962391552,148187802162935002975488
%N A367852 Expansion of e.g.f. 1/(1 - x + log(1 - 3*x)/3).
%F A367852 a(0) = 1; a(n) = n * a(n-1) + Sum_{k=1..n} 3^(k-1) * (k-1)! * binomial(n,k) * a(n-k).
%o A367852 (PARI) a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=i*v[i]+sum(j=1, i, 3^(j-1)*(j-1)!*binomial(i, j)*v[i-j+1])); v;
%Y A367852 Cf. A052820, A367851, A367853.
%Y A367852 Cf. A352069, A355111, A367846.
%K A367852 nonn
%O A367852 0,2
%A A367852 _Seiichi Manyama_, Dec 02 2023