Number of (n+2)X(6+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.
A252405
Number of (n+2)X(6+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) =4582a(1) =5060a(2) =18377a(3) =63428a(4) =267113a(5) =1068295a(6) =3896844a(7) =16806104a(8) =68150374a(9) =253409613a(10) =1108339723a(11) =4544602468a(12) =17078079134a(13) =75288883908a(14) =310760322629
External references
- oeis: A252405