Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7.
A252406
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7.
Terms
- a(0) =7662a(1) =8307a(2) =32710a(3) =122653a(4) =551827a(5) =2289969a(6) =8765249a(7) =39649367a(8) =163860739a(9) =627061685a(10) =2839245764a(11) =11737621589a(12) =44915317915a(13) =203379617026a(14) =841031366884
External references
- oeis: A252406