Number of nX3 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal.
A207312
Number of nX3 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal.
Terms
- a(0) =26a(1) =676a(2) =15390a(3) =347502a(4) =7791488a(5) =174545777a(6) =3908531208a(7) =87515884741
External references
- oeis: A207312