Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 2 3 4 6 or 7.
A252277
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 2 3 4 6 or 7.
Terms
- a(0) =1260a(1) =7922a(2) =37160a(3) =85808a(4) =518498a(5) =2489352a(6) =5767680a(7) =34496526a(8) =165959340a(9) =384876232a(10) =2298587370a(11) =11061103280a(12) =25655550076a(13) =153191338398a(14) =737201742464
External references
- oeis: A252277