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 A362761 #6 May 03 2023 21:36:55
%S A362761 1,0,1,2,18,138,4642,211600,13511246,1092862024,109276859229,
%T A362761 13221974420985,1903936637405380,321762396855180477,
%U A362761 63065061524052355523,14189582409276961769144,3632522968870016652531332,1049797035002712952582167891,340133739324533632977813192678
%N A362761 Number of nonisomorphic unordered triples of derangements of an n-set.
%C A362761 Isomorphism is up to permutation of the elements of the n-set.
%H A362761 Andrew Howroyd, <a href="/A362761/b362761.txt">Table of n, a(n) for n = 0..50</a>
%e A362761 The a(3) = 2 nonisomorphic triples of derangements are:
%e A362761 {(123), (123), (123)},
%e A362761 {(123), (123), (132)}.
%Y A362761 Column k=3 of A362759.
%Y A362761 Cf. A362646, A362760.
%K A362761 nonn
%O A362761 0,4
%A A362761 _Andrew Howroyd_, May 02 2023