T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 or 5.
A251989
T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 or 5.
Terms
- a(0) =2735a(1) =20011a(2) =20011a(3) =151635a(4) =231559a(5) =151635a(6) =1182549a(7) =3069283a(8) =3069283a(9) =1182549a(10) =9375901a(11) =43957515a(12) =79998655a(13) =43957515a(14) =9375901a(15) =75153161a(16) =663814741a(17) =2351304453a(18) =2351304453a(19) =663814741a(20) =75153161a(21) =607579255a(22) =10354206421
External references
- oeis: A251989