Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.

A252674

Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.

Terms

    a(0) =901a(1) =1005a(2) =2106a(3) =4298a(4) =11543a(5) =28363a(6) =64640a(7) =181608a(8) =459594a(9) =1077260a(10) =3086344a(11) =7919676a(12) =18750107a(13) =54232060a(14) =140107552a(15) =333274007a(16) =968659780a(17) =2511122087a(18) =5987505072a(19) =17447315392a(20) =45310860821a(21) =108172897186a(22) =315636791803

External references