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 A263151 #12 May 15 2019 12:42:44 %S A263151 4,5,9,1,1,7,4,2,9,8,7,8,5,2,7,6,1,4,8,0,6,8,5,9,6,0,9,8,3,7,8,9,8,0, %T A263151 7,7,5,1,9,5,6,6,4,4,0,7,2,7,7,1,6,6,9,6,7,8,5,9,9,5,0,6,9,3,2,8,8,2, %U A263151 1,9,3,2,5,3,6,8,2,6,6,2,5,3,3,6,8,1,8,8,8,5,2,4,7,5,7,9,5,2,3,1,1,8 %N A263151 Decimal expansion of the ratio of the length of the latus rectum arc of any parabola to its focal length: sqrt(8) + log(3 + sqrt(8)). %C A263151 Twice the universal parabolic constant A103710. %H A263151 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A263151 4.591174298785276148068596098378980775195664407277166967859950693... %t A263151 First@ RealDigits[N[# + Log[3 + #] &@ Sqrt@ 8, 102]] (* _Michael De Vlieger_, Oct 11 2015 *) %o A263151 (PARI) sqrt(8) + log(3 + sqrt(8)) \\ _Michel Marcus_, Oct 11 2015 %Y A263151 Equals twice A103710. Equals A010466 + A244920. %K A263151 cons,easy,nonn %O A263151 1,1 %A A263151 _Martin Janecke_, Oct 11 2015