A080324 Union of even squarefree numbers (A039956) and squarefree numbers for which the number of prime factors is even (A030229).

1, 2, 6, 10, 14, 15, 21, 22, 26, 30, 33, 34, 35, 38, 39, 42, 46, 51, 55, 57, 58, 62, 65, 66, 69, 70, 74, 77, 78, 82, 85, 86, 87, 91, 93, 94, 95, 102, 106, 110, 111, 114, 115, 118, 119, 122, 123, 129, 130, 133, 134, 138, 141, 142, 143, 145, 146, 154, 155, 158, 159, 161

Offset: 1

Author

Reinhard Zumkeller, Feb 14 2003

Keywords

• nonn

Comments

k is a term of this sequence iff mu(k)^k > 0 respectively iff A080323(k) > 0.

Crossrefs

Cf. A008683, A030229, A039956, A056912, A080323.

Extensions

Definition corrected by Georg Fischer at the suggestion of Amiram Eldar, Aug 17 2023