203130

Appears in sequences

• a(n) = 2*n*A071148(n).at n=36A177082
• a(n) = sigma_2(n)*sigma_3(n)/sigma(n).at n=21A320917
• Number of SAWs crossing a triangular domain of the hexagonal lattice and including the top vertex.at n=5A356614
• Number of n-node ordered rooted trees of height equal to the number of internal (non-leaf) nodes.at n=13A358588