A139787 Semiprime lucky numbers.

9, 15, 21, 25, 33, 49, 51, 69, 87, 93, 111, 115, 129, 133, 141, 159, 169, 201, 205, 219, 235, 237, 259, 267, 289, 303, 319, 321, 327, 339, 361, 391, 393, 415, 427, 451, 489, 511, 517, 519, 529, 535, 537, 553, 559, 579, 583, 591, 655, 679, 685, 699, 717

Offset: 1

Author

Jonathan Vos Post, May 20 2008

Keywords

• easy
• nonn

Comments

Subset of A031879 Composite lucky numbers.

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000959, A001358, A031879.

Formula

A000959 INTERSECTION A001358.

Extensions

Term 135 deleted by Giovanni Resta, Jun 20 2016