1649061309
domain: N
Appears in sequences
- a(n) = (2^n - 1)/product(2^p - 1) where the product is over all distinct primes p that divide n.at n=41A055515
- Quotient of A000225 and A064084.at n=41A064085
- Condensed version of A064085: all terms of A064085 with values greater than 1 (which coincides with all terms of A064085 with nonprime power index).at n=20A064086