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Number of connected subgroups of the symmetric group S_n.
2

%I #8 Dec 04 2018 20:04:56

%S 0,1,1,2,12,30,639,1835,64601,369518,12351620,78569754,5477440592,

%T 35108337731,3031753084624,30230571143624,3308601182539217,

%U 33507627807222128,5183154493935250901

%N Number of connected subgroups of the symmetric group S_n.

%H N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>

%F Logarithmic transform of A005432.

%Y Labeled version of A005226.

%K nonn,hard

%O 0,4

%A _Christian G. Bower_, Feb 23 2006

%E a(13)-a(18) added (using data from A005432) by _Alois P. Heinz_, Dec 04 2018