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 A377804 #12 Feb 11 2025 14:39:07 %S A377804 5,5,2,8,6,7,4,4,9,5,8,4,4,5,1,4,8,9,4,3,6,5,7,0,7,0,5,5,8,7,8,0,7,6, %T A377804 2,5,3,1,7,4,4,5,9,5,1,1,6,3,2,9,9,9,2,5,1,1,6,0,1,2,7,6,0,7,3,3,2,5, %U A377804 0,8,8,2,4,4,6,8,3,5,9,5,5,1,7,6,1,2,2,1,8,6 %N A377804 Decimal expansion of the surface area of a snub dodecahedron with unit edge length. %H A377804 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SnubDodecahedron.html">Snub Dodecahedron</a>. %H A377804 Wikipedia, <a href="https://en.wikipedia.org/wiki/Snub_dodecahedron">Snub dodecahedron</a>. %H A377804 <a href="/index/Al#algebraic_08">Index entries for algebraic numbers, degree 8</a>. %F A377804 Equals 20*sqrt(3) + 3*sqrt(25 + 10*sqrt(5)) = 20*A002194 + A131595. %e A377804 55.2867449584451489436570705587807625317445951163... %t A377804 First[RealDigits[20*Sqrt[3] + 3*Sqrt[25 + 10*Sqrt[5]], 10, 100]] (* or *) %t A377804 First[RealDigits[PolyhedronData["SnubDodecahedron", "SurfaceArea"], 10, 100]] %Y A377804 Cf. A377805 (volume), A377806 (circumradius), A377807 (midradius). %Y A377804 Cf. A131595 (analogous for a regular dodecahedron). %Y A377804 Cf. A002194. %K A377804 nonn,cons,easy %O A377804 2,1 %A A377804 _Paolo Xausa_, Nov 08 2024