Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 3 6 or 7.
A251785
Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 3 6 or 7.
Terms
- a(0) =1664a(1) =2640a(2) =6470a(3) =14908a(4) =35948a(5) =85826a(6) =210582a(7) =525800a(8) =1281188a(9) =3230514a(10) =8269042a(11) =20728732a(12) =53387162a(13) =139225802a(14) =357534236a(15) =936054498a(16) =2475510686a(17) =6476921720a(18) =17167048240a(19) =45854800004a(20) =121609864088a(21) =325220317710a(22) =874682014058
External references
- oeis: A251785