Number of (n+2)X(1+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.
A251976
Number of (n+2)X(1+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) =2930a(1) =9822a(2) =41682a(3) =138390a(4) =463054a(5) =1762248a(6) =6881308a(7) =25756230a(8) =95113860a(9) =357237462a(10) =1353522690a(11) =5103212182a(12) =19169232472a(13) =72126802532a(14) =271890916970
External references
- oeis: A251976