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 A098321 #11 Mar 26 2015 15:05:55 %S A098321 0,11,233,223,1080,2631,19161,318674,269389,609124,97349,125496, %T A098321 2611514,6766458,2093818,4312197,4284994,7170002,567295,234495, %U A098321 1574091,1722475,6848664,777039,637036,1367169,8195403,3747746,21147798,2053675,6009248,12095,312755,1205372,15773902,139394774,169096914 %N A098321 Recurrence sequence based on positions of digits in decimal places of gamma, the Euler-Mascheroni constant. %F A098321 a(1)=0, p(i)=position of first occurrence of a(i) in decimal places of gamma, a(i+1)=p(i). %e A098321 So for example, a(2)=11 because 11th digit of gamma after decimal point is 0. %e A098321 a(3)=233 because 233rd decimal digit of gamma is where 11 appears, a(4)=223 because 223rd to 225th digits of gamma form "233" and so on. %Y A098321 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. See A001620 for gamma digits. %K A098321 easy,nonn,base %O A098321 0,2 %A A098321 Mark Hudson (mrmarkhudson(AT)hotmail.com), Sep 03 2004 %E A098321 More terms from _Charles R Greathouse IV_, Sep 25 2008