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

A264005

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

Terms

    a(0) =9a(1) =99a(2) =1089a(3) =8679a(4) =69169a(5) =568343a(6) =4669921a(7) =38152455a(8) =311699025a(9) =2548552215a(10) =20837788609a(11) =170360646951

External references