Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #7 Nov 27 2024 17:56:33
%S 0,0,0,0,1,2,3,4,5,9,11,17,19,25,31,40,48,59
%N Number of subgroups of S_n isomorphic to S_5 up to conjugacy, where S_n is the n-th symmetric group.
%o (GAP) A378274 := function(n)
%o return Length(IsomorphicSubgroups(SymmetricGroup(n), SymmetricGroup(5)));
%o end;
%Y Column k=5 of A378177.
%Y Cf. A004526, A378266, A378273.
%K nonn,hard,more,new
%O 1,6
%A _Jianing Song_, Nov 21 2024