A321062 - OEIS

%I #4 Oct 27 2018 14:24:38

%S 1216,19312,467696,15608288,678914816,37083546112,2475764410944,

%T 197890932247680,18629724957708800,2038137238577944576,

%U 256240757035057154048,36670707901174666768384,5924904192825339158446080,1073049649261575998090559488

%N Number of ordered pairs (p,q) of permutations of [n] with equal up-down signatures and p(1)=q(1)=6.

%Y Column k=6 of A262372.

%K nonn

%O 6,1

%A _Alois P. Heinz_, Oct 26 2018