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

A252099

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

Terms

    a(0) =4581a(1) =4866a(2) =5087a(3) =8941a(4) =21405a(5) =50222a(6) =120128a(7) =312242a(8) =762514a(9) =1878978a(10) =4952226a(11) =12363575a(12) =31123465a(13) =82567495a(14) =210479834a(15) =540052088a(16) =1440608932a(17) =3742122672a(18) =9761698780a(19) =26154115812a(20) =69025530491a(21) =182512931249a(22) =490665213507

External references