Number of (n+2) X (1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 3 4 5 or 6.
A251830
Number of (n+2) X (1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 3 4 5 or 6.
Terms
- a(0) =678a(1) =3354a(2) =18124a(3) =97316a(4) =518514a(5) =2764828a(6) =14778068a(7) =79010324a(8) =422170156a(9) =2255865816a(10) =12055912400a(11) =64428206472a(12) =344303766674
External references
- oeis: A251830