Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
A252512
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =9526a(1) =76113a(2) =252551a(3) =584827a(4) =1629431a(5) =5381168a(6) =17585706a(7) =57799811a(8) =185530073a(9) =599739636a(10) =2051749067a(11) =6783005877a(12) =22492217702a(13) =80205331055a(14) =272388576539a(15) =929003666072
External references
- oeis: A252512