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 A377799 #6 Nov 08 2024 11:38:28 %S A377799 3,7,6,9,3,7,7,1,2,7,9,2,1,7,1,6,6,0,2,6,7,2,2,6,4,2,0,0,6,6,1,9,4,2, %T A377799 4,3,5,6,3,0,0,5,1,5,7,1,9,6,1,7,2,8,3,9,2,0,1,7,9,7,6,7,9,1,4,6,1,1, %U A377799 5,6,3,4,7,3,8,9,4,3,6,8,5,4,8,2,7,6,4,9,2,4 %N A377799 Decimal expansion of the midradius of a truncated icosidodecahedron (great rhombicosidodecahedron) with unit edge length. %H A377799 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GreatRhombicosidodecahedron.html">Great Rhombicosidodecahedron</a>. %H A377799 Wikipedia, <a href="https://en.wikipedia.org/wiki/Truncated_icosidodecahedron">Truncated icosidodecahedron</a>. %F A377799 Equals sqrt(15/2 + 3*sqrt(5)) = sqrt(15/2 + A010499) = sqrt(30 + A344171)/2. %e A377799 3.76937712792171660267226420066194243563005157196... %t A377799 First[RealDigits[Sqrt[15/2 + Sqrt[45]], 10, 100]] (* or *) %t A377799 First[RealDigits[PolyhedronData["TruncatedIcosidodecahedron", "Midradius"], 10, 100]] %Y A377799 Cf. A377796 (surface area), A377797 (volume), A377798 (circumradius). %Y A377799 Cf. A010499, A344171. %K A377799 nonn,cons,easy %O A377799 1,1 %A A377799 _Paolo Xausa_, Nov 08 2024