A036446 Not of form sigma(k) - phi(k).

1, 3, 4, 6, 8, 9, 12, 13, 17, 19, 21, 25, 29, 31, 37, 41, 43, 45, 46, 49, 51, 53, 55, 57, 58, 61, 65, 69, 70, 71, 77, 81, 82, 85, 89, 91, 93, 97, 99, 101, 103, 105, 109, 111, 113, 114, 115, 117, 118, 121, 125, 127, 130, 131, 133, 134, 137, 139, 141, 142, 145, 149, 151

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Links

• Robert Israel, Table of n, a(n) for n = 1..5510 (terms <= 10000)

Crossrefs

Complement of A112730.

Cf. A000010, A000203, A051612.