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

A264520

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

Terms

    a(0) =1a(1) =1a(2) =0a(3) =1a(4) =0a(5) =1a(6) =2a(7) =1a(8) =3a(9) =0a(10) =4a(11) =2a(12) =9a(13) =0a(14) =1a(15) =6a(16) =4a(17) =42a(18) =36a(19) =12a(20) =0a(21) =9a(22) =8a(23) =196a(24) =228a(25) =144a(26) =0a(27) =1a(28) =12a(29) =16

External references