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 A377798 #7 Nov 08 2024 11:38:25 %S A377798 3,8,0,2,3,9,4,4,9,9,8,5,1,2,9,3,5,8,4,7,6,6,8,3,6,7,1,4,1,1,0,3,2,3, %T A377798 2,0,9,3,0,3,8,9,2,8,6,5,2,5,1,2,8,5,6,2,1,1,8,9,2,8,4,3,9,8,2,3,4,3, %U A377798 9,6,1,4,2,2,8,9,2,1,2,6,6,5,7,3,7,7,7,8,2,4 %N A377798 Decimal expansion of the circumradius of a truncated icosidodecahedron (great rhombicosidodecahedron) with unit edge length. %H A377798 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GreatRhombicosidodecahedron.html">Great Rhombicosidodecahedron</a>. %H A377798 Wikipedia, <a href="https://en.wikipedia.org/wiki/Truncated_icosidodecahedron">Truncated icosidodecahedron</a>. %F A377798 Equals sqrt(31/4 + 3*sqrt(5)) = sqrt(31/4 + A010499) = sqrt(31 + A344171)/2. %e A377798 3.802394499851293584766836714110323209303892865251... %t A377798 First[RealDigits[Sqrt[31/4 + Sqrt[45]], 10, 100]] (* or *) %t A377798 First[RealDigits[PolyhedronData["TruncatedIcosidodecahedron", "Circumradius"], 10, 100]] %Y A377798 Cf. A377796 (surface area), A377797 (volume), A377799 (midradius). %Y A377798 Cf. A010499, A344171. %K A377798 nonn,cons,easy %O A377798 1,1 %A A377798 _Paolo Xausa_, Nov 08 2024