Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 1,-2 or 1,1.

A264138

Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 1,-2 or 1,1.

Terms

    a(0) =45a(1) =720a(2) =15488a(3) =297920a(4) =5953600a(5) =117534144a(6) =2330885440a(7) =46152976320a(8) =914311870272

External references