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 A068387 #14 May 12 2023 12:20:15 %S A068387 17,19,1236467,12670930520527,238010096542661, %T A068387 1556215151728015474002572174232146034933078744209044582588391660602774177237968073343 %N A068387 Prime coefficients in the Engel expansion of Pi = prime values in A006784(n). %o A068387 (PARI) /* 5000 significant digits */ s=asin(1)*2; for(i=0,1000,s=s*ceil(1/s)-1; if(isprime(ceil(1/s))==1,print1(ceil(1/s),",")); ); %Y A068387 Cf. A006784. %K A068387 easy,nonn %O A068387 1,1 %A A068387 _Benoit Cloitre_, Mar 03 2002