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 A377694 #7 Nov 06 2024 04:40:31 %S A377694 1,0,0,9,9,0,7,6,0,1,5,3,1,0,1,9,8,8,5,4,4,7,4,5,9,4,8,9,8,8,6,3,6,6, %T A377694 5,6,5,5,4,9,1,5,0,9,0,5,7,5,1,8,5,6,7,5,9,5,1,4,5,3,7,2,2,4,0,8,5,0, %U A377694 5,5,6,3,7,3,9,3,9,6,7,2,7,7,3,9,0,4,3,5,4,2 %N A377694 Decimal expansion of the surface area of a truncated dodecahedron with unit edge length. %H A377694 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TruncatedDodecahedron.html">Truncated Dodecahedron</a>. %H A377694 Wikipedia, <a href="https://en.wikipedia.org/wiki/Truncated_dodecahedron">Truncated dodecahedron</a>. %F A377694 Equals 5*(sqrt(3) + 6*sqrt(5 + 2*sqrt(5))) = 5*(A002194 + 6*sqrt(5 + A010476)). %e A377694 100.990760153101988544745948988636656554915090575... %t A377694 First[RealDigits[5*(Sqrt[3] + 6*Sqrt[5 + Sqrt[20]]), 10, 100]] (* or *) %t A377694 First[RealDigits[PolyhedronData["TruncatedDodecahedron", "SurfaceArea"], 10, 100]] %Y A377694 Cf. A377695 (volume), A377696 (circumradius), A377697 (midradius), A377698 (Dehn invariant, negated). %Y A377694 Cf. A131595 (analogous for a regular dodecahedron). %Y A377694 Cf. A002194, A010476. %K A377694 nonn,cons,easy %O A377694 3,4 %A A377694 _Paolo Xausa_, Nov 04 2024