156420
domain: N
Appears in sequences
- Numbers j such that j and 2j are both between a pair of twin primes.at n=34A066388
- Numbers n such that sigma(n) = 14*phi(n) (where sigma=A000203, phi=A000010).at n=13A171259
- Numbers m such that exactly four subsets of {m-1, m, m+1} sum up to a prime number.at n=37A221310
- Numbers n such that n = concatenate(a, b) and sigma(a) + sigma(b) = phi(n).at n=13A249065