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

Author

Patrick De Geest, Jun 15 1998

Keywords

• nonn

Links

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

Crossrefs

Cf. A014613.

Programs

Mathematica

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

Extensions

Offset corrected by Zak Seidov, May 03 2020