A046317 Odd numbers divisible by exactly 4 primes (counted with multiplicity).

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

Offset

1,1

Links

Zak Seidov, Table of n, a(n) for n = 1..10000 (terms 1..1000 from Harvey P. Dale)

Mathematica

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

Crossrefs

Cf. A014613.

Sequence in context: A001245 A186463 A371846 * A046374 A153259 A369977

Adjacent sequences: A046314 A046315 A046316 * A046318 A046319 A046320

Keyword

nonn

Author

Patrick De Geest, Jun 15 1998

Extensions

Offset corrected by Zak Seidov, May 03 2020

Status

approved