216523

Properties

Appears in sequences

• Number of pairs (y, v) where y is a composition of n and v is a (not necessarily contiguous) subsequence of y whose length equals the number of distinct parts in y.at n=15A355384
• Expansion of (1/x) * Series_Reversion( x * (1 - x - x/(1 - x)^2) ).at n=7A378466
• Prime numbersat n=19324