Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.

A252329

Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.

Terms

    a(0) =6089a(1) =6222a(2) =10070a(3) =22016a(4) =68675a(5) =180469a(6) =503439a(7) =1603276a(8) =4554309a(9) =13198911a(10) =42321262a(11) =123032456a(12) =365923870a(13) =1183764527a(14) =3477836469a(15) =10490088213a(16) =34100824690a(17) =100813753401a(18) =306346399367a(19) =998375745118

External references