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 A278897 #19 Apr 14 2022 15:17:54
%S A278897 1,1,14,146275425484,558429168112511379835233509679413804180016
%N A278897 First series of Hankel determinants based on Bell numbers of argument k^2, Bell(k^2).
%C A278897 If we regard Bell(k^2) as the k-th Stieltjes moment for k>=0, then the solution of the Stieltjes moment problem is given in the P. Blasiak et al. reference, see below. We conjecture that a(n)>0 for n>=0. The positivity of these Hankel determinants a(n), n>=0 is one of the conditions for the existence of a positive solution. Apparently this solution is not unique.
%H A278897 P. Blasiak, K. A. Penson and A. I. Solomon, <a href="http://arxiv.org/abs/quant-ph/0303030">Dobinsky-type relations and the log-normal distribution</a>, J. Phys. A: Math. Gen. 36, L273 (2003), arXiv: quant-ph/0303030, 2003.
%p A278897 with(LinearAlgebra), with(combinat):
%p A278897 h20:=(i,j)->bell((i+j-2)^2):
%p A278897 seq(Determinant(Matrix(kk,kk,h20)),kk=0..6);
%t A278897 Table[Det[Table[BellB[(i + j - 2)^2], {i, n}, {j, n}]], {n, 6}], n=>1.
%Y A278897 Cf. A000110, A277829, A278770, A278868, A278860.
%K A278897 nonn
%O A278897 0,3
%A A278897 _Karol A. Penson_, Nov 30 2016