Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.
A252686
Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =4038a(1) =13494a(2) =64640a(3) =136414a(4) =916706a(5) =4829707a(6) =10457376a(7) =70249416a(8) =372527375a(9) =806660058a(10) =5422537973a(11) =28763936254a(12) =62268911097a(13) =418917039497
External references
- oeis: A252686