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 A098323 #14 Jul 12 2015 19:49:51 %S A098323 0,1,3,9,2,33,27,82,48,162,279,1140,5727,20729,717726,430977,1112328 %N A098323 Recurrence sequence based on positions of digits in decimal places of 1/G, where G is Catalan's constant (also often called K). %F A098323 a(1)=0, p(i)=position of first occurrence of a(i) in decimal places of 1/G, a(i+1)=p(i). %e A098323 1/G=1.091744063703906101454159473... %e A098323 So for example, a(2)=1 because first decimal place of 1/G is 0. %e A098323 a(3)=3 because 3rd decimal place of 1/G is 1, a(4)=9 because the 9th decimal place of 1/G is 3 and so on. %Y A098323 Other recurrence sequences: A097614 for Pi, A098266 for e, A098289 for log(2), A098290 for Zeta(3), A098319 for 1/Pi, A098320 for 1/e, A098321 for gamma, A098322 for G. %K A098323 more,nonn,base %O A098323 0,3 %A A098323 Mark Hudson (mrmarkhudson(AT)hotmail.com), Sep 03 2004 %E A098323 a(13) from _Nathaniel Johnston_, Apr 30 2011 %E A098323 a(14)-a(16) from _D. S. McNeil_, Oct 01 2011