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 A068415 #12 Nov 20 2020 20:44:11 %S A068415 3,3,16,36,211,971,1546,1619,1676,2781,5016,41282,342476,906352, %T A068415 1023757,1948794,7848891,13836275,30581008,38602286,170598710, %U A068415 379204788,619298045,725045787,1682291679,24640189358,24751265017,104930341224,139089631515,463053103677 %N A068415 Engel expansion of log(Pi/2). %o A068415 (PARI) r=log(Pi/2); for(i=1, 30, s=r*ceil(1/r)-1; print1(ceil(1/r), ", "); r=s); /* _Georg Fischer_, Nov 20 2020 */ %Y A068415 Cf. A094642. %K A068415 easy,nonn %O A068415 1,1 %A A068415 _Benoit Cloitre_, Mar 03 2002 %E A068415 a(1) corrected and a(28)-a(30) from _Georg Fischer_, Nov 20 2020