Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 1 3 6 or 7.

A252154

Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 1 3 6 or 7.

Terms

    a(0) =5577a(1) =4732a(2) =9572a(3) =15460a(4) =29276a(5) =57271a(6) =114243a(7) =225966a(8) =451186a(9) =898886a(10) =1796742a(11) =3567622a(12) =7180566a(13) =14252982a(14) =28550806a(15) =57071990a(16) =114226230a(17) =227100406a(18) =457805238a(19) =909211446a(20) =1822429366a(21) =3645696566a(22) =7298665782a(23) =14515253302

External references