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 A364896 #13 Jun 12 2024 17:07:06 %S A364896 7,8,7,8,5,6,9,8,1,0,3,4,3,3,7,9,3,3,9,9,2,1,1,6,8,5,9,1,1,3,8,8,7,4, %T A364896 3,6,4,9,6,4,0,8,9,8,5,8,8,1,5,3,1,4,0,8,9,0,2,7,4,5,6,3,9,5,0,3,6,0, %U A364896 4,3,1,3,1,4,3,6,6,3,1,1,3,5,2,1,7,9,0,5,3,9,4,7,6,7,6,0,3,7 %N A364896 Decimal expansion of the 4-volume of the unit regular 120-cell. %C A364896 Decimal expansion of (1575+705*sqrt(5))/4. %H A364896 Polytope Wiki, <a href="https://polytope.miraheze.org/wiki/Hecatonicosachoron">Hecatonicosachoron</a> %H A364896 Wikipedia, <a href="https://en.wikipedia.org/wiki/120-cell">120-cell</a> %e A364896 Equals 787.85698103433793399211... %t A364896 First[RealDigits[(1575 + 705*Sqrt[5])/4, 10, 100]] (* _Paolo Xausa_, Jun 12 2024 *) %o A364896 (PARI) (1575+705*sqrt(5))/4 %Y A364896 Decimal expansion of 4-volumes: A364895 (5-cell), A000007 = 1 (8-cell or tesseract), A020793 = 1/6 (16-cell), A000038 = 2 (24-cell), this sequence (120-cell), A364897 (600-cell). %Y A364896 Cf. A102769 (decimal expansion of the volume of the unit regular dodecahedron). %K A364896 nonn,cons %O A364896 3,1 %A A364896 _Jianing Song_, Aug 12 2023