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 A385259 #10 Jun 26 2025 12:09:31 %S A385259 2,0,3,9,2,3,0,4,8,4,5,4,1,3,2,6,3,7,6,1,1,6,4,6,7,8,0,4,9,0,3,5,2,3, %T A385259 4,2,0,1,6,5,6,8,3,1,5,2,2,8,6,2,2,8,3,7,6,8,3,3,4,8,4,1,8,7,6,7,1,1, %U A385259 5,9,8,1,0,1,4,5,2,8,0,0,2,2,2,4,8,6,8,7,7,1 %N A385259 Decimal expansion of the surface area of a gyroelongated square bicupola with unit edge. %C A385259 The gyroelongated square bicupola is Johnson solid J_45. %H A385259 Paolo Xausa, <a href="/A385259/b385259.txt">Table of n, a(n) for n = 2..10000</a> %H A385259 Wikipedia, <a href="https://en.wikipedia.org/wiki/Gyroelongated_square_bicupola">Gyroelongated square bicupola</a>. %F A385259 Equals 10 + 6*sqrt(3) = 10 + 6*A002194. %F A385259 Equals the largest root of x^2 - 20*x - 8. %e A385259 20.392304845413263761164678049035234201656831522862... %t A385259 First[RealDigits[10 + 6*Sqrt[3], 10, 100]] (* or *) %t A385259 First[RealDigits[PolyhedronData["J45", "SurfaceArea"], 10, 100]] %Y A385259 Cf. A385258 (volume). %Y A385259 Cf. A002194, A179588, A384215, A385257. %K A385259 nonn,cons,easy %O A385259 2,1 %A A385259 _Paolo Xausa_, Jun 26 2025