This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A079877 #39 Aug 29 2025 20:27:26 %S A079877 15,30,35,45,60,70,75,90,105,120,135,140,143,150,165,175,180,195,210, %T A079877 225,240,245,255,270,280,285,286,300,315,323,330,345,350,360,375,385, %U A079877 390,405,420,429,435,450,455,465,480,490,495,510,525,540,555,560,570,572 %N A079877 Numbers that are divisible by at least one pair of twin primes (A001097). %C A079877 Numbers that are divisible by both primes of some twin-prime pair. _Harvey P. Dale_, Aug 18 2017 %C A079877 By definition, if k is in the sequence, then so is every positive multiple of k. - _Richard Locke Peterson_, Aug 17 2017 %H A079877 Harvey P. Dale, <a href="/A079877/b079877.txt">Table of n, a(n) for n = 1..1000</a> %e A079877 429 = 3*11*13 = 3*A001359(3)*A006512(3), therefore 429 is a term. %t A079877 Select[Range[600],MemberQ[Differences[Transpose[FactorInteger[#]][[1]]], 2]&] (* _Harvey P. Dale_, Sep 19 2011 *) %Y A079877 Cf. A001097, A001359, A006512, A037074, A062505, A074480, A289484. %K A079877 nonn,changed %O A079877 1,1 %A A079877 _Reinhard Zumkeller_, Feb 20 2003 %E A079877 Definition clarified by _N. J. A. Sloane_, Aug 18 2017 %E A079877 Definition further clarified by _Sean A. Irvine_, Aug 29 2025