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 A362651 #6 May 03 2023 10:51:49 %S A362651 1,1,3,7,74,1532,478902,1561933881,74069769621942, %T A362651 44786847731274624558,454923769422460614413179958, %U A362651 75365529411732671264995255795387368,250450659464630320300793563353757730632329596,16712244262184960007363857016489055045260380508520606142 %N A362651 Number of nonisomorphic multisets of involutions on an n-set with n involutions. %C A362651 Isomorphism is up to permutation of the elements of the n-set. %H A362651 Andrew Howroyd, <a href="/A362651/b362651.txt">Table of n, a(n) for n = 0..40</a> %Y A362651 Main diagonal of A362648. %Y A362651 Cf. A362382, A362647. %K A362651 nonn %O A362651 0,3 %A A362651 _Andrew Howroyd_, May 01 2023