130065

Appears in sequences

• Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at most 3.at n=21A242525
• Number of nonequivalent noncrossing trees with n edges up to rotation.at n=10A296532
• a(n) is the denominator of the sum of reciprocals of primes not exceeding n and not dividing binomial(2*n, n).at n=29A334075