T(n,k)=Number of zero-sum nXk -2..2 arrays with every element equal to at least one horizontal or vertical neighbor.

A201888

T(n,k)=Number of zero-sum nXk -2..2 arrays with every element equal to at least one horizontal or vertical neighbor.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =1a(4) =9a(5) =1a(6) =5a(7) =63a(8) =63a(9) =5a(10) =1a(11) =413a(12) =765a(13) =413a(14) =1a(15) =23a(16) =3293a(17) =26003a(18) =26003a(19) =3293a(20) =23a(21) =25a(22) =25123a(23) =559115a(24) =2171313a(25) =559115a(26) =25123a(27) =25a(28) =97a(29) =196811

External references