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A046317 Odd numbers divisible by exactly 4 primes (counted with multiplicity). 5
81, 135, 189, 225, 297, 315, 351, 375, 441, 459, 495, 513, 525, 585, 621, 625, 693, 735, 765, 783, 819, 825, 837, 855, 875, 975, 999, 1029, 1035, 1071, 1089, 1107, 1155, 1161, 1197, 1225, 1269, 1275, 1287, 1305, 1365, 1375, 1395, 1425, 1431, 1449, 1521 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..1000

Eric Weisstein's World of Mathematics, Prime Triplet.

MATHEMATICA

Select[Range[1, 1601, 2], PrimeOmega[#]==4&] (* Harvey P. Dale, Aug 15 2014 *)

CROSSREFS

Cf. A014613.

Sequence in context: A119943 A001245 A186463 * A046374 A153259 A207050

Adjacent sequences:  A046314 A046315 A046316 * A046318 A046319 A046320

KEYWORD

nonn

AUTHOR

Patrick De Geest, Jun 15 1998.

STATUS

approved

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Last modified December 4 17:35 EST 2016. Contains 278755 sequences.