Number of nX3 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.
A206792
Number of nX3 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.
Terms
- a(0) =61a(1) =3721a(2) =180446a(3) =8683735a(4) =420657877a(5) =20388622016a(6) =988006480837
External references
- oeis: A206792