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

A255153

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

Terms

    a(0) =62a(1) =158a(2) =459a(3) =1285a(4) =3553a(5) =9978a(6) =27903a(7) =77798a(8) =217554a(9) =608257a(10) =1699201a(11) =4748763a(12) =13272520a(13) =37089779a(14) =103651288a(15) =289674102a(16) =809528613a(17) =2262327549a(18) =6322405953a(19) =17668817420a(20) =49377854351a(21) =137993195876a(22) =385640766218

External references