22169

Appears in sequences

• Number of partitions of n into parts not of the form 17k, 17k+8 or 17k-8. Also number of partitions with at most 7 parts of size 1 and differences between parts at distance 7 are greater than 1.at n=40A035969
• Least non-balanced x (i.e., not in A020492) such that sigma(p(n),x)/phi(x) is an integer, where p(n) = n-th prime.at n=29A078540
• First time n appears in the first differences of n*log(n): A217865.at n=11A217976
• Number of rooted identity trees with n nodes and exactly 5 subtrees from the root.at n=9A227809
• a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} phi(i*j*k) / phi(j*k).at n=14A372663