Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.
A252555
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.
Terms
- a(0) =4284a(1) =8508a(2) =29158a(3) =104515a(4) =474384a(5) =1818662a(6) =6914968a(7) =30571435a(8) =118748167a(9) =457814585a(10) =2021592880a(11) =7890733470a(12) =30536066929a(13) =135030341429a(14) =528049571248
External references
- oeis: A252555