Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7.
A252454
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7.
Terms
- a(0) =1731a(1) =7223a(2) =38966a(3) =203320a(4) =1058050a(5) =5596619a(6) =29527662a(7) =155721485a(8) =823647387a(9) =4355427974a(10) =23011713271a(11) =121620027508a(12) =643010695889
External references
- oeis: A252454