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

A264190

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

Terms

    a(0) =2a(1) =4a(2) =4a(3) =8a(4) =24a(5) =8a(6) =16a(7) =81a(8) =81a(9) =16a(10) =32a(11) =375a(12) =720a(13) =375a(14) =32a(15) =64a(16) =1600a(17) =7056a(18) =7056a(19) =1600a(20) =64a(21) =128a(22) =6656a(23) =70560a(24) =147968a(25) =70560a(26) =6656a(27) =128a(28) =256a(29) =28561

External references