Number of nX3 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column or nw-to-se diagonal.
A206572
Number of nX3 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column or nw-to-se diagonal.
Terms
- a(0) =61a(1) =3721a(2) =188699a(3) =9509750a(4) =478456896a(5) =24071410239
External references
- oeis: A206572