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 A367490 #11 Nov 20 2023 11:55:07
%S A367490 0,0,6,36,336,4380,73080,1481844,35320992,966875724,29874822600,
%T A367490 1028081942052,38985534525168,1614899447153148,72543518616692760,
%U A367490 3512306387815898580,182320857226312198464,10100520471366488756652,594804877105749056467560
%N A367490 Expansion of e.g.f. -x * log(4 - 3*exp(x)).
%F A367490 a(n) = n * Sum_{k=1..n-1} 3^k * (k-1)! * Stirling2(n-1,k).
%o A367490 (PARI) a(n) = n*sum(k=1, n-1, 3^k*(k-1)!*stirling(n-1, k, 2));
%Y A367490 Cf. A052862, A367489.
%Y A367490 Cf. A032183, A201354.
%K A367490 nonn,easy
%O A367490 0,3
%A A367490 _Seiichi Manyama_, Nov 19 2023