Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 3 4 6 or 7.
A252126
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 3 4 6 or 7.
Terms
- a(0) =2149a(1) =10379a(2) =44895a(3) =106631a(4) =566817a(5) =2564965a(6) =5921321a(7) =32909665a(8) =153318163a(9) =344985321a(10) =1983252321a(11) =9414695501a(12) =20822456313a(13) =122373021057a(14) =587858709777
External references
- oeis: A252126