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 A185968 #12 May 08 2023 15:08:24
%S A185968 0,1,32,2304,524288,419430400,1236950581248,13792273858822144,
%T A185968 590295810358705651712,97922991388784963151200256,
%U A185968 63382530011411470074835160268800
%N A185968 a(n) = n^2*2^(n^2-1).
%C A185968 a(n) is the number of elements (ordered pairs) in all binary relations on {1,2,...,n}.
%C A185968 Equivalently a(n) is the number of 1's in all n X n {0,1} matrices.
%H A185968 G. C. Greubel, <a href="/A185968/b185968.txt">Table of n, a(n) for n = 0..57</a>
%t A185968 Table[n^2 *2^(n^2-1),{n,0,10}]
%o A185968 (PARI) for(n=0,25, print1(n^2 *2^(n^2-1), ", ")) \\ _G. C. Greubel_, Jul 23 2017
%Y A185968 Cf. A175716.
%K A185968 nonn
%O A185968 0,3
%A A185968 _Geoffrey Critzer_, Feb 07 2011