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 A323504 #7 Jan 17 2019 17:19:43 %S A323504 2,2,5,2,5,30,5,2,5,30,11,30,5,30,5,2,5,30,11,30,11,2310,11,30,5,30, %T A323504 11,30,5,30,5,2,5,30,11,30,11,2310,11,30,11,2310,17,2310,11,2310,11, %U A323504 30,5,30,11,30,11,2310,11,30,5,30,11,30,5,30,5,2,5,30,11,30,11,2310,11,30,11,2310,17,2310,11,2310,11,30,11,2310,17,2310,17 %N A323504 a(n) = A322827(2n+1) / A322827(n). %H A323504 Antti Karttunen, <a href="/A323504/b323504.txt">Table of n, a(n) for n = 0..16383</a> %F A323504 a(n) = A322827(2n+1) / A322827(n). %o A323504 (PARI) %o A323504 A322827(n) = if(!n,1,my(bits = Vecrev(binary(n)), rl=1, o = List([])); for(i=2,#bits,if(bits[i]==bits[i-1], rl++, listput(o,rl))); listput(o,rl); my(es=Vecrev(Vec(o)), m=1); for(i=1,#es,m *= prime(i)^es[i]); (m)); %o A323504 A323504(n) = A322827(n+n+1)/A322827(n); %Y A323504 Cf. A322827, A323503. %Y A323504 Bisection of A323507. %K A323504 nonn %O A323504 0,1 %A A323504 _Antti Karttunen_, Jan 17 2019