Number of (n+2) X (6+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 2 4 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 2 4 6 or 7.
A252521
Number of (n+2) X (6+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 2 4 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 2 4 6 or 7.
Terms
- a(0) =1471a(1) =5214a(2) =21510a(3) =47308a(4) =268555a(5) =1215491a(6) =2662952a(7) =15755867a(8) =73792188a(9) =160605830a(10) =977103095a(11) =4668722734a(12) =10119572634a(13) =62609075589a(14) =302574704284a(15) =654293895244
External references
- oeis: A252521