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 A165343 #8 Feb 24 2019 07:35:02
%S A165343 1,3,656,58910976,7213311014731776,3024546589156405495726080000,
%T A165343 9172616430046109813423337553212211200000000
%N A165343 First series of Hankel determinants based on A001044(n)=(n!)^2 : a(n)=det(A001044(i+j-2))=det(((i+j-2)!)^2), i,j=1,2...n. Hankel transform of A001044.
%C A165343 It would be highly desirable to obtain a closed form for a(n).
%t A165343 nmax = 15; Table[Det[Table[((i+j-2)!)^2, {i, 1, k}, {j, 1, k}]], {k, 1, nmax}] (* _Vaclav Kotesovec_, Feb 24 2019 *)
%K A165343 nonn
%O A165343 0,2
%A A165343 _Karol A. Penson_, Sep 15 2009