444448

Appears in sequences

• The number of complete binary trees with bicolored twigs. A twig is a vertex with one child on the boundary and the other child having no descendants.at n=11A228404
• Number of 3 X n 0..2 arrays with no element equal to any value at offset (-2,-2) (-1,-2) or (0,-1) and new values introduced in order 0..2.at n=12A275143