73665

Appears in sequences

• Number of positive integers <= 2^n of form 2 x^2 + 5 y^2.at n=19A000286
• Number of unlabeled rooted trees with n vertices whose non-leaf terminal subtrees are all different.at n=15A324936
• Numbers m such that both m^2-1 and m^2 are refactorable numbers (A033950) and that m^2 has more divisors than m^2-1.at n=34A342970
• a(n)/n! is the average number of key comparisons required to perform an indirect sort of n records with distinct keys using a two-way merge (A. D. Woodall's mergesort).at n=5A350568