Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
A252636
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
Terms
- a(0) =3162a(1) =8253a(2) =29463a(3) =95904a(4) =395940a(5) =1504636a(6) =5124134a(7) =21431528a(8) =82893234a(9) =292817550a(10) =1230551308a(11) =4802902204a(12) =17419191296a(13) =73465113332a(14) =288429221652
External references
- oeis: A252636