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 A366572 #15 Oct 14 2023 13:13:24 %S A366572 1,2,6,2,30,6,42,6,10,10,66,6,2730,210,2,6,510,10,798,42,110,330,138, %T A366572 2,546,546,2,2,870,30,14322,462,170,510,6,2,1919190,51870,2,6,13530, %U A366572 110,1806,42,46,690,1410,2,1326,1326,22,66,1590,10,798,798,290,870 %N A366572 a(n) = denominator(Bernoulli(n, x)) / denominator(Bernoulli''(n, x)). %F A366572 a(n) = A144845(n) / A366168(n). %p A366572 seq(denom(bernoulli(n, x))/denom(diff(diff(bernoulli(n, x), x),x)), n=0..100); %o A366572 (PARI) a(n) = lcm(apply(denominator, Vec(bernpol(n))))/lcm(apply(denominator, Vec(deriv(deriv(bernpol(n)))))); \\ _Michel Marcus_, Oct 14 2023 %Y A366572 Cf. A144845/A366168, A366571, A144845/A324370 (1st derivative). %K A366572 nonn %O A366572 0,2 %A A366572 _Peter Luschny_, Oct 13 2023