Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,2 or 1,0.

A264208

Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,2 or 1,0.

Terms

    a(0) =9a(1) =96a(2) =1024a(3) =7328a(4) =52441a(5) =422505a(6) =3404025a(7) =26420400a(8) =205062400a(9) =1610785200a(10) =12652875225a(11) =99005135055a(12) =774686906569

External references