A079877 Numbers that are divisible by at least one pair of twin primes (A001097).

15, 30, 35, 45, 60, 70, 75, 90, 105, 120, 135, 140, 143, 150, 165, 175, 180, 195, 210, 225, 240, 245, 255, 270, 280, 285, 286, 300, 315, 323, 330, 345, 350, 360, 375, 385, 390, 405, 420, 429, 435, 450, 455, 465, 480, 490, 495, 510, 525, 540, 555, 560, 570, 572

Offset: 1

Author

Reinhard Zumkeller, Feb 20 2003

Keywords

• nonn
• changed

Comments

Numbers that are divisible by both primes of some twin-prime pair. Harvey P. Dale, Aug 18 2017

By definition, if k is in the sequence, then so is every positive multiple of k. - Richard Locke Peterson, Aug 17 2017

Examples

			429 = 3*11*13 = 3*A001359(3)*A006512(3), therefore 429 is a term.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A001097, A001359, A006512, A037074, A062505, A074480, A289484.

Programs

Mathematica

Select[Range[600],MemberQ[Differences[Transpose[FactorInteger[#]][[1]]], 2]&] (* Harvey P. Dale, Sep 19 2011 *)

Extensions

Definition clarified by N. J. A. Sloane, Aug 18 2017

Definition further clarified by Sean A. Irvine, Aug 29 2025