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

1,1

Comments

Subset of A031879 Composite lucky numbers.

Links

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

Formula

A000959 INTERSECTION A001358.

Crossrefs

Cf. A000959, A001358, A031879.

Sequence in context: A025045 A107987 A031879 * A372080 A225461 A172181

Adjacent sequences: A139784 A139785 A139786 * A139788 A139789 A139790

Keyword

easy,nonn

Author

Jonathan Vos Post, May 20 2008

Extensions

Term 135 deleted by Giovanni Resta, Jun 20 2016

Status

approved