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A239289 Numbers that are not the product of three (not necessarily distinct) primes. 1
1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 13, 14, 15, 16, 17, 19, 21, 22, 23, 24, 25, 26, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43, 46, 47, 48, 49, 51, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 64, 65, 67, 69, 71, 72, 73, 74, 77, 79, 80, 81, 82, 83, 84, 85, 86, 87 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Complement of A014612.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[130], ! PrimeOmega[#]==3 &]

CROSSREFS

Cf. A014612.

Sequence in context: A072497 A300064 A039217 * A131511 A210490 A340682

Adjacent sequences:  A239286 A239287 A239288 * A239290 A239291 A239292

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jun 14 2014

STATUS

approved

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Last modified November 27 12:51 EST 2021. Contains 349394 sequences. (Running on oeis4.)