Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 2 3 4 6 or 7.
A252276
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 2 3 4 6 or 7.
Terms
- a(0) =852a(1) =4702a(2) =20430a(3) =43488a(4) =257064a(5) =1181875a(6) =2489352a(7) =15332220a(8) =72256060a(9) =151452208a(10) =959982508a(11) =4591052192a(12) =9592850068a(13) =61849559376a(14) =298253419076a(15) =622061005236
External references
- oeis: A252276