149124

Appears in sequences

• "DHK" (bracelet, identity, unlabeled) transform of 1,2,3,4,...at n=16A032254
• Numbers k such that sigma(phi(k)) = phi(sigma(k)).at n=29A033632
• Numbers k such that phi(2*sigma(k)) = 2*sigma(phi(k)).at n=33A067709
• Numbers k such that sigma(phi(k)) == phi(sigma(k)) (mod k), that is, A033632(k)/k is an integer.at n=31A092584