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%I #4 Oct 27 2018 14:23:58
%S 88,952,17008,438496,15214848,678914816,37727416576,2548520444480,
%T 205352644205568,19438574276705792,2134484763328610304,
%U 269000435778983860224,38553984887490450800640,6234291052542667315675136,1129460021283312750345682944
%N Number of ordered pairs (p,q) of permutations of [n] with equal up-down signatures and p(1)=q(1)=5.
%Y Column k=5 of A262372.
%K nonn
%O 5,1
%A _Alois P. Heinz_, Oct 26 2018