A321064 - OEIS

%I #4 Oct 27 2018 14:25:53

%S 654424,19209584,769534688,39729927744,2548520444480,197890932247680,

%T 18237517555977472,1964023269922621952,244043425473888612352,

%U 34621419911316556017664,5557654485553447834816512,1001744885342172367869042688,201381195927539873971774119936

%N Number of ordered pairs (p,q) of permutations of [n] with equal up-down signatures and p(1)=q(1)=8.

%Y Column k=8 of A262372.

%K nonn

%O 8,1

%A _Alois P. Heinz_, Oct 26 2018