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 A385257 #10 Jun 28 2025 09:14:55 %S A385257 1,4,6,6,0,2,5,4,0,3,7,8,4,4,3,8,6,4,6,7,6,3,7,2,3,1,7,0,7,5,2,9,3,6, %T A385257 1,8,3,4,7,1,4,0,2,6,2,6,9,0,5,1,9,0,3,1,4,0,2,7,9,0,3,4,8,9,7,2,5,9, %U A385257 6,6,5,0,8,4,5,4,4,0,0,0,1,8,5,4,0,5,7,3,0,9 %N A385257 Decimal expansion of the surface area of a gyroelongated triangular bicupola with unit edge. %C A385257 The gyroelongated triangular bicupola is Johnson solid J_44. %H A385257 Paolo Xausa, <a href="/A385257/b385257.txt">Table of n, a(n) for n = 2..10000</a> %H A385257 Wikipedia, <a href="https://en.wikipedia.org/wiki/Gyroelongated_triangular_bicupola">Gyroelongated triangular bicupola</a>. %F A385257 Equals 6 + 5*sqrt(3) = 6 + 5*A002194 = 6 + 10*A010527. %F A385257 Equals the largest root of x^2 - 12*x - 39. %e A385257 14.660254037844386467637231707529361834714026269... %t A385257 First[RealDigits[6 + 5*Sqrt[3], 10, 100]] (* or *) %t A385257 First[RealDigits[PolyhedronData["J44", "SurfaceArea"], 10, 100]] %Y A385257 Cf. A385256 (volume). %Y A385257 Cf. A002194, A010527. %Y A385257 Essentially the same of A332133, A375193 and A010527. %K A385257 nonn,cons,easy %O A385257 2,2 %A A385257 _Paolo Xausa_, Jun 24 2025