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 A243311 #9 Dec 24 2024 10:43:45 %S A243311 2,6,8,8,9,5,6,6,0,1,6,9,3,1,1,2,2,5,4,6,9,2,9,4,8,6,7,2,2,7,2,4,5,6, %T A243311 6,4,5,2,4,9,9,4,4,3,7,1,9,3,0,3,1,3,7,2,9,2,1,0,7,6,4,8,0,2,5,7,6,3, %U A243311 9,2,6,0,9,0,0,9,9,2,6,4,7,2,9,4,4,3,7,4,8,1,3,4,8,4,3,1,8,1,9,7,5,3 %N A243311 Decimal expansion of the volume of a regular ideal hyperbolic 4-simplex. %D A243311 Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 8.9 Hyperbolic volume constants, p. 512. %F A243311 Equals 10*Pi/3*arcsin(1/3) - Pi^2/3. %e A243311 0.268895660169311225469294867227245664524994437... %t A243311 RealDigits[10*Pi/3*ArcSin[1/3] - Pi^2/3, 10, 102] // First %o A243311 (PARI) 10*Pi/3*asin(1/3) - Pi^2/3 \\ _Stefano Spezia_, Dec 24 2024 %Y A243311 Cf. A019503, A143298 (Gieseking's constant is also the volume of a regular ideal hyperbolic 3-simplex). %K A243311 nonn,cons,easy %O A243311 0,1 %A A243311 _Jean-François Alcover_, Jun 03 2014