Number of (3+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.

A252535

Number of (3+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.

Terms

    a(0) =460a(1) =334a(2) =466a(3) =626a(4) =1120a(5) =1760a(6) =2404a(7) =4304a(8) =6832a(9) =9416a(10) =16864a(11) =26912a(12) =37264a(13) =66752a(14) =106816a(15) =148256a(16) =265600a(17) =425600a(18) =591424a(19) =1059584a(20) =1699072a(21) =2362496a(22) =4232704a(23) =6789632a(24) =9443584a(25) =16919552a(26) =27145216a(27) =37761536a(28) =67655680a(29) =108554240

External references