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 A156543 #7 Aug 07 2022 07:39:18 %S A156543 1,7,13,17,19,31,37,43,47,49,59,61,67,71,73,79,91,97,101,103,107,109, %T A156543 119,127,133,137,139,149,151,157,163,167,169,181,193,197,199,211,217, %U A156543 221,223,227,229,241,247,257,259,263,269,271,277,283,289,301,307,311 %N A156543 Multiplicative closure of primes that are not Sophie Germain primes (A053176). %C A156543 a(n) mod 6 = 1 or = 5; subsequence of A007310; %C A156543 A156542(a(n)) = 0; %C A156543 A045979 is a subsequence. %H A156543 Reinhard Zumkeller, <a href="/A156543/b156543.txt">Table of n, a(n) for n = 1..1000</a> %Y A156543 Cf. A007310, A045979, A053176, A156541, A156542. %K A156543 nonn %O A156543 1,2 %A A156543 _Reinhard Zumkeller_, Feb 09 2009