72380

Appears in sequences

• Numerator sequence of mean length of certain stackings of n+1 squares on a double staircase.at n=16A055245
• Number of different strings of length n+4 obtained from "123...n" by iteratively duplicating any substring.at n=31A137741
• Expansion of g.f.: 1/(Sum_{p odd prime} x^p)^2 (even powers only).at n=31A351317