Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
A252196
Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
Terms
- a(0) =970a(1) =669a(2) =1647a(3) =5177a(4) =17541a(5) =60325a(6) =206825a(7) =711829a(8) =2455121a(9) =8451245a(10) =29078203a(11) =100127089a(12) =344830251a(13) =1187280753a(14) =4087599057a(15) =14073866459a(16) =48459148779a(17) =166851565227a(18) =574482172271
External references
- oeis: A252196