Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
A252510
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =3326a(1) =9277a(2) =28877a(3) =68163a(4) =188123a(5) =584827a(6) =1808374a(7) =5522057a(8) =16698268a(9) =50754770a(10) =155857175a(11) =475425332a(12) =1450405974a(13) =4455098471a(14) =13624986376a(15) =41681897176a(16) =128139306335a(17) =392648151022
External references
- oeis: A252510