Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
A252439
Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
Terms
- a(0) =1603a(1) =6164a(2) =24024a(3) =53028a(4) =284379a(5) =1190037a(6) =2718502a(7) =14673858a(8) =60822070a(9) =140120224a(10) =759992540a(11) =3151322013a(12) =7307890607a(13) =39819735578a(14) =165035172520a(15) =384707477228
External references
- oeis: A252439