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 1,2.

A263964

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 1,2.

Terms

    a(0) =4a(1) =20a(2) =9a(3) =108a(4) =141a(5) =25a(6) =465a(7) =2089a(8) =1685a(9) =64a(10) =2265a(11) =23841a(12) =95161a(13) =16856a(14) =169a(15) =10920a(16) =283641a(17) =3801496a(18) =3232688a(19) =183229a(20) =441a(21) =52752a(22) =3408145a(23) =180329601a(24) =406984645a(25) =123067561a(26) =1926873a(27) =1156a(28) =253176a(29) =40723017

External references