%I #3 Mar 31 2012 12:35:46
%S 0,0,1,12,66,248,739,1880,4260,8832,17061,31108,54054,90168,145223,
%T 226864
%N Number of permutations of 1..n with both permutation and its inverse having exactly 2 maxima
%K nonn
%O 1,4
%A _R. H. Hardin_ Sep 01 2010