161268

Appears in sequences

• Numbers k such that sigma(sigma(k)) == phi(k) (mod sigma(k)).at n=28A067204
• Numbers k such that phi(6k) is either phi(6k-2) or phi(6k+2), where phi is Euler's totient function A000010.at n=35A279011
• Numbers k such that phi(6k) = phi(6k+2), where phi is Euler's totient function A000010.at n=16A279184