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

A252060

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

Terms

    a(0) =383a(1) =817a(2) =2349a(3) =7463a(4) =25220a(5) =86642a(6) =299027a(7) =1035506a(8) =3595103a(9) =12486601a(10) =43369095a(11) =150672097a(12) =523549752a(13) =1819232513a(14) =6321437284a(15) =21965788279a(16) =76327880609a(17) =265229912286a(18) =921639469993

External references