Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum not 0 1 2 7 8 or 9 and every diagonal and antidiagonal sum 0 1 2 7 8 or 9.
A251977
Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum not 0 1 2 7 8 or 9 and every diagonal and antidiagonal sum 0 1 2 7 8 or 9.
Terms
- a(0) =9822a(1) =73222a(2) =516108a(3) =2703512a(4) =16324414a(5) =113817844a(6) =782954632a(7) =5188534650a(8) =34257278876a(9) =228560005812
External references
- oeis: A251977