239760
domain: N
Appears in sequences
- a(0) = 1, a(n) = 20*sigma[3](n).at n=22A091983
- Integers with exactly 100 divisors.at n=17A163816
- a(n) = the product of all distinct positive (nonzero) integers that, when written in binary, occur as substrings in the binary representation of n.at n=36A165153
- Number of symmetric primitive Lucas strings of length n.at n=35A250112
- Abundant numbers k such that k^2 + A033880(k)^2 is a perfect square.at n=7A377134