213328

Appears in sequences

• Number of 2nX6 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly one horizontal or vertical neighbor.at n=2A198530
• T(n,k)=Number of 2nX2k 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly one horizontal or vertical neighbor.at n=12A198532
• Number of lattice paths from (0,0) to (n,0) that do not go below the x-axis and consist of steps U=(1,1), D=(1,-1) and H=(1,0), where H-steps are only allowed if y=1.at n=19A224747
• Number of equivalence classes of ballot paths of length n for the string ddu.at n=35A274112