Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
A252014
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
Terms
- a(0) =3246a(1) =6562a(2) =14450a(3) =29954a(4) =104034a(5) =303906a(6) =630978a(7) =2189170a(8) =6377986a(9) =13220098a(10) =45964930a(11) =133947666a(12) =277662018a(13) =965273490a(14) =2812900946a(15) =5830902338a(16) =20270743250a(17) =59070919826a(18) =122448949058a(19) =425685608210
External references
- oeis: A252014