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 A364895 #16 Jun 12 2024 16:17:17 %S A364895 0,2,3,2,9,2,3,7,4,7,6,5,6,2,2,8,0,9,3,3,7,5,9,5,5,5,9,0,4,9,2,8,4,1, %T A364895 2,7,4,5,2,5,0,6,4,4,1,2,4,5,9,5,3,3,9,2,9,6,1,1,5,5,1,7,9,6,3,9,6,9, %U A364895 2,9,2,6,3,0,8,7,2,7,1,3,4,3,6,8,9,0,0,1,5,0,0,8,7,2,7,8,9,8,2,0 %N A364895 Decimal expansion of the 4-volume of the unit regular pentachoron (5-cell). %C A364895 Decimal expansion of sqrt(5)/96. %C A364895 In general, the n-volume of the unit regular n-simplex is sqrt(n+1)/(n!*2^(n/2)). %H A364895 Wikipedia, <a href="https://en.wikipedia.org/wiki/5-cell">5-cell</a> %H A364895 Polytope Wiki, <a href="https://polytope.miraheze.org/wiki/Pentachoron">Pentachoron</a> %e A364895 Equals 0.02329237476562280933... %t A364895 First[RealDigits[Sqrt[5]/96, 10, 100, -1]] (* _Paolo Xausa_, Jun 12 2024 *) %o A364895 (PARI) sqrt(5)/96 %Y A364895 Decimal expansion of 4-volumes: this sequence (5-cell), A000007 = 1 (8-cell or tesseract), A020793 = 1/6 (16-cell), A000038 = 2 (24-cell), A364896 (120-cell), A364897 (600-cell). %Y A364895 Decimal expansion of the n-volume of the unit regular n-simplex: A120011 (n=2), A020829 (n=3), this sequence (n=4). %K A364895 nonn,cons %O A364895 0,2 %A A364895 _Jianing Song_, Aug 12 2023