180446

Appears in sequences

• Number of n X n 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.at n=2A206789
• Number of nX3 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.at n=2A206792
• T(n,k)=Number of nXk 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.at n=12A206797