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 A001332 M3710 N1516 #31 Jan 19 2023 11:09:57
%S A001332 1,1,-4,120,-12096,3024000,-1576143360,1525620096000,
%T A001332 -2522591034163200,6686974460694528000,-27033456071346536448000,
%U A001332 160078872315904478576640000,-1342964491649083924630732800000,15522270327163593186886877184000000
%N A001332 a(n) = Bernoulli(2*n) * (2*n + 1)!.
%D A001332 G. S. Kazandzidis, On a Matrix and a Class of Polynomials, Bulletin de la Société Mathématique de Grèce, Nouvelle Série - Vol. 6 I, Fasc. 1, (1965), pp. 105-126.
%D A001332 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D A001332 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A001332 T. D. Noe, <a href="/A001332/b001332.txt">Table of n, a(n) for n = 0..50</a>
%H A001332 Zentralblatt, <a href="https://zbmath.org/0161.01204">Review of Kazandzidis, On a Matrix and a Class of Polynomials</a>.
%H A001332 <a href="/index/Be#Bernoulli">Index entries for sequences related to Bernoulli numbers.</a>
%F A001332 Lacunary e.g.f: x / (exp(x) - 1) + x / 2 = Sum_{k>=0} a(k) * x^(2*k) / ((2*k)! * (2*k + 1)!). - _Michael Somos_, Mar 29 2011
%F A001332 a(n) = determinant of the 2n X 2n matrix ( d(i,j) = binomial( i+1, i-j+2) if j < i+2 else 0 ). - _Michael Somos_, Oct 08 2003
%F A001332 a(n) = A129814(2*n). - _Michael Somos_, Mar 29 2011
%t A001332 Table[BernoulliB[2*n]*(2*n + 1)!, {n, 0, 20}] (* _T. D. Noe_, Jun 28 2012 *)
%o A001332 (PARI) {a(n) = if( n<0, 0, (2*n + 1)! * bernfrac( 2*n))} /* _Michael Somos_, Oct 08 2003 */
%Y A001332 Cf. A129814.
%K A001332 sign,nice
%O A001332 0,3
%A A001332 _N. J. A. Sloane_