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

A252299

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

Terms

    a(0) =1126a(1) =1031a(2) =1168a(3) =1516a(4) =2350a(5) =3476a(6) =4905a(7) =8198a(8) =12725a(9) =18474a(10) =31440a(11) =49424a(12) =72442a(13) =124128a(14) =195932a(15) =288438a(16) =495208a(17) =783064a(18) =1155314a(19) =1984208a(20) =3140404a(21) =4639378a(22) =7965648a(23) =12613908a(24) =18651858a(25) =32006608a(26) =50702292a(27) =75026642a(28) =128658128

External references