228960
domain: N
Appears in sequences
- Least number m such that cardinality of InvPhi(m) = prime(n).at n=33A071389
- Number of ordered pairs (a,b) of elements of the symmetric group S_n such that the pair a,b generates S_n.at n=5A071605
- Records in A007374.at n=24A105207
- Averages y of twin prime pairs that satisfy y = x^2 + x - 2.at n=24A214840
- n! times the number of posets with n unlabeled elements.at n=6A363911