Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.
A252564
Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.
Terms
- a(0) =3761a(1) =16327a(2) =93997a(3) =242136a(4) =1818662a(5) =11035929a(6) =28350064a(7) =216831038a(8) =1329037293a(9) =3382609190a(10) =26245219961a(11) =162112063819a(12) =409459673087
External references
- oeis: A252564