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 A080185 #8 Dec 24 2023 01:07:25
%S A080185 7,29,59,149,179,239,269,599,809,1619,2999,4049,4799,8999,9719,15359,
%T A080185 21599,23039,33749,138239,179999,281249,345599,737279,3455999,6143999,
%U A080185 6560999,10124999,13668749,15551999,17495999,20995199,22118399,23999999
%N A080185 Primes p such that 5 is the largest of all prime factors of the numbers between p and the next prime (cf. A052248).
%C A080185 The sequence consists of 7 and the lesser of twin primes q (A001359) such that q+1 is 5-smooth (A051037) but not 3-smooth (A003586, A080193).
%H A080185 Amiram Eldar, <a href="/A080185/b080185.txt">Table of n, a(n) for n = 1..1000</a>
%e A080185 7 is a term since 8 = 2^3, 9 = 3^3, 10 = 2*5 are the numbers between 7 and the next prime 11; 149 is a term since 150 = 2*3*5^2 is the only number between 149 and the next prime 151.
%o A080185 (PARI) {forprime(p=2,24000000,q=nextprime(p+1); m=0; j=p+1; while(j<q&&m<=5,f=factor(j); a=f[matsize(f)[1],1]; if(m<a,m=a); j++); if(m==5,print1(p,",")))}
%Y A080185 Cf. A052248, A001359, A051037, A003586, A080193.
%K A080185 nonn
%O A080185 1,1
%A A080185 _Klaus Brockhaus_, Feb 10 2003