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 A362650 #7 May 03 2023 10:51:52
%S A362650 1,1,4,7,29,63,258,759,3263,12250,56330,250841,1235205,6113154,
%T A362650 31941407,169613842,932670975,5223815423,30040926830,175918987173,
%U A362650 1053086891249,6413469553076,39818396779256,251251607202822,1613056058498375,10514730684539068
%N A362650 Number of nonisomorphic unordered triples of involutions on an n-set.
%C A362650 Isomorphism is up to permutation of the elements of the n-set.
%H A362650 Andrew Howroyd, <a href="/A362650/b362650.txt">Table of n, a(n) for n = 0..50</a>
%e A362650 The a(3) = 7 nonisomorphic triples of involutions are:
%e A362650 {(), (), ()},
%e A362650 {(), (), (23)},
%e A362650 {(), (23), (23)},
%e A362650 {(), (23), (12)},
%e A362650 {(23), (23), (23)},
%e A362650 {(23), (23), (12)},
%e A362650 {(23), (12), (13)}.
%Y A362650 Column k=3 of A362648.
%Y A362650 Cf. A362646, A362649.
%K A362650 nonn
%O A362650 0,3
%A A362650 _Andrew Howroyd_, May 01 2023