Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.

A252426

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.

Terms

    a(0) =641a(1) =602a(2) =608a(3) =878a(4) =1152a(5) =1603a(6) =2617a(7) =4131a(8) =6514a(9) =11116a(10) =18318a(11) =29859a(12) =51493a(13) =85589a(14) =140525a(15) =243028a(16) =404779a(17) =665504a(18) =1151754a(19) =1919298a(20) =3156379a(21) =5463943a(22) =9106163a(23) =14976103a(24) =25929380a(25) =43214599a(26) =71070066a(27) =123069528a(28) =205112198a(29) =337314463

External references