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

A264184

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

Terms

    a(0) =4a(1) =24a(2) =81a(3) =375a(4) =1600a(5) =6656a(6) =28561a(7) =120393a(8) =509796a(9) =2161720a(10) =9150625a(11) =38773295a(12) =164249856a(13) =695734272a(14) =2947295521a(15) =12484753489a(16) =52886200900a(17) =224030247000a(18) =949005240561

External references