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 A364897 #10 Jun 12 2024 16:17:12 %S A364897 2,6,4,7,5,4,2,4,8,5,9,3,7,3,6,8,5,6,0,2,5,5,7,3,3,5,4,2,9,5,7,0,4,7, %T A364897 6,4,7,1,5,0,3,8,6,4,7,4,7,5,7,2,0,3,5,7,7,6,6,9,3,1,0,7,7,8,3,8,1,5, %U A364897 7,5,5,7,8,5,2,3,6,2,8,0,6,2,1,3,4,0,0,9,0,0,5,2,3,6,7,3,8,9,2 %N A364897 Decimal expansion of the 4-volume of the unit regular 600-cell. %C A364897 Decimal expansion of (50+25*sqrt(5))/4. %H A364897 Wikipedia, <a href="https://en.wikipedia.org/wiki/600-cell">600-cell</a> %H A364897 Polytope Wiki, <a href="https://polytope.miraheze.org/wiki/Hexacosichoron">Hexacosichoron</a> %e A364897 Equals 26.47542485937368560255... %t A364897 First[RealDigits[(50 + 25*Sqrt[5])/4, 10, 100]] (* _Paolo Xausa_, Jun 12 2024 *) %o A364897 (PARI) (50+25*sqrt(5))/4 %Y A364897 Decimal expansion of 4-volumes: A364895 (5-cell), A000007 = 1 (8-cell or tesseract), A020793 = 1/6 (16-cell), A000038 = 2 (24-cell), A364896 (120-cell), this sequence (600-cell). %Y A364897 Cf. A102208 (decimal expansion of the volume of the unit regular icosahedron). %K A364897 nonn,cons %O A364897 2,1 %A A364897 _Jianing Song_, Aug 12 2023