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%I #5 Jul 06 2018 23:13:10
%S 1,5,13,42,49,105,116,498,254,381,378,1402,550,929,1383,3110,1041,
%T 2530,1486,5386,3512,2952,2120,24770
%N Number of abelian subgroups of the group SL(2, Z(n)), counting conjugates as distinct.
%o (GAP) Concatenation([1], List([2..10], n->Sum( Filtered( ConjugacyClassesSubgroups( SL(2, Integers mod n)), x->IsAbelian( Representative(x))), Size)));
%Y Cf. A316537, A316559.
%K nonn,more
%O 1,2
%A _Andrew Howroyd_, Jul 06 2018
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