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 A366570 #11 Oct 14 2023 13:12:16 %S A366570 1,1,1,2,1,6,1,6,1,10,1,6,1,210,5,2,1,30,5,210,7,110,5,30,1,546,7,14, %T A366570 1,30,1,462,77,1190,35,6,1,51870,455,70,7,2310,55,2310,7,322,35,210,1, %U A366570 6630,221,286,11,330,55,798,19,290,5,30,1,930930,5005,1430 %N A366570 a(n) = numerator(denominator(Bernoulli'(n, x)) / denominator(Bernoulli(n, 1))). %F A366570 a(n) = numerator(A324370(n) / A027642(n)). %p A366570 seq(numer(denom(diff(bernoulli(n, x), x))/denom(bernoulli(n, 1))), n = 0..66); %o A366570 (PARI) a(n) = numerator(lcm(apply(denominator, Vec(deriv(bernpol(n)))))/denominator(subst(bernpol(n, x), x, 1))); \\ _Michel Marcus_, Oct 14 2023 %Y A366570 Cf. A324370/A027642, A366152 (denominator), A366426/A366427 (2nd derivative). %K A366570 nonn,frac %O A366570 0,4 %A A366570 _Peter Luschny_, Oct 13 2023