31170

Appears in sequences

• Sum of all parts of all partitions of n that do not contain 1 as a part.at n=29A138880
• Sum of parts in all partitions of 2n that do not contain 1 as a part.at n=15A182736
• Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2*n new points on the other two sides: sequence gives number of edges in the resulting planar graph.at n=10A366485