767620

Appears in sequences

• The binary encoding (as a rooted planar tree) of each rooted planar binary tree. See A057123 for illustration.at n=31A057122
• Number of 4 X n 0..1 arrays avoiding 0 0 1 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=27A207255