Number of (6+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.
A252685
Number of (6+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) =2554a(1) =7164a(2) =28363a(3) =56318a(4) =314753a(5) =1404868a(6) =2879551a(7) =16215688a(8) =73440337a(9) =150742726a(10) =853509651a(11) =3885489828a(12) =7973408731a(13) =45304665056a(14) =206951131499a(15) =424580014364
External references
- oeis: A252685