Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
A252432
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
Terms
- a(0) =6941a(1) =10309a(2) =38186a(3) =151863a(4) =652210a(5) =2718502a(6) =10924203a(7) =47376966a(8) =196667998a(9) =788158275a(10) =3419420671a(11) =14214579202a(12) =56964813491a(13) =246973156585
External references
- oeis: A252432