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 A382546 #17 Apr 14 2025 05:32:29
%S A382546 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,
%T A382546 27,28,30,31,32,33,34,35,36,37,38,39,40,42,44,45,46,47,48,49,50,51,52,
%U A382546 53,54,55,56,57,60,62,63,64,65,66,68,69,70,71,72,73,74,75
%N A382546 Positive integers whose prime factors are all in A219528.
%H A382546 Steven Lu, <a href="/A382546/b382546.txt">Table of n, a(n) for n = 1..10000</a>
%F A382546 Sum_{n>=1} 1/a(n) = 1/Product_{p in A219528} (1-1/p) = 7.52982574262479641306... . - _Amiram Eldar_, Apr 14 2025
%t A382546 Select[Range[75], And @@ Table[SubsetQ[{2, 3}, First /@ FactorInteger[p + 1]] || SubsetQ[{2, 3}, First /@ FactorInteger[p - 1]], {p, First /@ FactorInteger[#]}] &]
%Y A382546 Cf. A219528.
%K A382546 nonn
%O A382546 1,2
%A A382546 _Steven Lu_, Mar 31 2025