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 A062839 #11 Oct 10 2022 12:29:07 %S A062839 1,3,5,8,10,14,16,20,24,27,33,36,40,44,48,53,57,63,66,70,75,78,84,90, %T A062839 95,100,104,106,110,118,122,132,135,143,145,153,157,162,168,173,177, %U A062839 185,187,194,196,204,211,219,226,230,234,237,245,249,257,263,267,273 %N A062839 a(n) = floor((prime(n-1)+prime(n+1))/2). %F A062839 a(n) = A024675(n-1) - A028334(n-1), n>2. - _R. J. Mathar_, Apr 16 2008 %o A062839 (PARI) j=[]; for(n=1,200,j=concat(j,floor((prime(n-1)+prime(n+1))/2))); j %Y A062839 Cf. A000040, A024675, A028334. %K A062839 nonn %O A062839 1,2 %A A062839 _Jason Earls_, Jul 21 2001