Number of (3+2)X(n+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.

A252682

Number of (3+2)X(n+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) =808a(1) =991a(2) =2106a(3) =3424a(4) =9794a(5) =24666a(6) =42376a(7) =125832a(8) =326768a(9) =565518a(10) =1698816a(11) =4451760a(12) =7722912a(13) =23328330a(14) =61391478a(15) =106584670a(16) =322954248a(17) =852076548a(18) =1479906686a(19) =4493335028a(20) =11876176592a(21) =20631760216a(22) =62734685478a(23) =166027399194

External references