Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.

A255085

Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.

Terms

    a(0) =265a(1) =522a(2) =964a(3) =2005a(4) =4405a(5) =9989a(6) =22601a(7) =50980a(8) =114903a(9) =261406a(10) =602851a(11) =1401088a(12) =3245506a(13) =7500936a(14) =17319501a(15) =40038474a(16) =92880007a(17) =215939488a(18) =501628958a(19) =1164460794a(20) =2701599314a(21) =6267866505a(22) =14554457354a(23) =33816400387a(24) =78558506481

External references