Number of (n+2)X(2+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 or 5.
A251986
Number of (n+2)X(2+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 or 5.
Terms
- a(0) =20011a(1) =231559a(2) =3069283a(3) =43957515a(4) =663814741a(5) =10354206421a(6) =164646337261
External references
- oeis: A251986