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 A245673 #14 Feb 16 2025 08:33:23 %S A245673 3,5,0,7,0,4,8,0,7,5,8,7,0,6,3,6,7,3,0,8,2,6,8,5,9,0,1,0,8,9,8,2,8,9, %T A245673 0,0,5,7,3,6,4,2,0,3,5,6,5,8,2,2,6,9,0,6,0,6,1,7,5,0,7,9,9,3,7,5,5,4, %U A245673 8,5,5,0,3,2,5,7,0,7,2,8,9,8,5,7,3,8,7,2,5,1,8,8,2,3,7,9,4,1,2,2,3,2,0,4,1 %N A245673 Decimal expansion of C, a coin tossing constant related to the asymptotic variance of the length of the longest run of consecutive heads. %D A245673 Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 5.11 Feller Coin Tossing Constants, p. 341. %H A245673 Vincenzo Librandi, <a href="/A245673/b245673.txt">Table of n, a(n) for n = 1..1000</a> %H A245673 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Run.html">Run</a>. %F A245673 C = 1/12 + Pi^2/(6*log(2)^2). %e A245673 3.5070480758706367308268590108982890057364203565822690606175079937554855... %t A245673 RealDigits[1/12 + Pi^2/(6*Log[2]^2), 10, 105] // First %Y A245673 Cf. A244293. %K A245673 nonn,cons,easy %O A245673 1,1 %A A245673 _Jean-François Alcover_, Jul 29 2014