Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.
A252100
Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.
Terms
- a(0) =6549a(1) =5087a(2) =10878a(3) =26996a(4) =86550a(5) =252110a(6) =727203a(7) =2385233a(8) =7252003a(9) =21530207a(10) =71430665a(11) =221511832a(12) =667563186a(13) =2234984052a(14) =7007535529a(15) =21309886921a(16) =71700419249a(17) =226330484881a(18) =692070910403
External references
- oeis: A252100