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 (+-,+-) 0,2 1,1 or 1,0.

A263973

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 (+-,+-) 0,2 1,1 or 1,0.

Terms

    a(0) =4a(1) =20a(2) =0a(3) =108a(4) =72a(5) =16a(6) =465a(7) =1817a(8) =1441a(9) =0a(10) =2265a(11) =10720a(12) =86633a(13) =13856a(14) =64a(15) =10920a(16) =89472a(17) =2604481a(18) =2940624a(19) =189993a(20) =0a(21) =52752a(22) =1791696a(23) =102742049a(24) =226810352a(25) =118376593a(26) =2215960a(27) =256a(28) =253176a(29) =27783305

External references