|
%I #5 Feb 21 2013 15:16:35
%S 0,1,18,360,7560,289440,9828000,631169280,46449002880,4526271187200,
%T 524461965350400,74044329341875200,12211524764030592000
%N Number of ordered pairs (a,b) of elements of the symmetric group S_n such that the pair a,b generates a proper subgroup of S_n.
%F a(n) = n!^2 - A071605(n).
%Y Cf. A071605.
%K nonn
%O 1,3
%A Yuval Dekel (dekelyuval(AT)hotmail.com), Sep 09 2003
%E a(10)-(13) from _Stephen A. Silver_, Feb 21 2013
|
