The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A100367 Even numbers with two prime factors, not counting multiplicity. 3
 6, 10, 12, 14, 18, 20, 22, 24, 26, 28, 34, 36, 38, 40, 44, 46, 48, 50, 52, 54, 56, 58, 62, 68, 72, 74, 76, 80, 82, 86, 88, 92, 94, 96, 98, 100, 104, 106, 108, 112, 116, 118, 122, 124, 134, 136, 142, 144, 146, 148, 152, 158, 160, 162, 164, 166, 172, 176, 178, 184, 188 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This is a proper subset of A098902. E.g., 210 is not here, but it is there. Numbers of the form 2^k*p^h where k > 0, h > 0, and p is an odd prime. [corrected by Lei Zhou, Oct 29 2018] LINKS Michael De Vlieger, Table of n, a(n) for n = 1..10000 MATHEMATICA Select[Range[2, 200, 2], PrimeNu@ # == 2 &] (* Michael De Vlieger, Oct 31 2018 *) PROG (PARI) isok(n) = !(n%2) && (omega(n) == 2); \\ Michel Marcus, Feb 02 2018 CROSSREFS Cf. A001221, A098902, A100368. Sequence in context: A176587 A174164 A098902 * A213716 A114989 A334166 Adjacent sequences:  A100364 A100365 A100366 * A100368 A100369 A100370 KEYWORD nonn AUTHOR Labos Elemer, Nov 22 2004 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 26 17:02 EDT 2020. Contains 334630 sequences. (Running on oeis4.)