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 A385535 #7 Jul 03 2025 10:05:38 %S A385535 9,9,0,5,0,5,6,4,1,6,3,1,5,6,8,8,4,3,2,5,7,2,9,1,6,6,3,7,7,8,8,9,6,3, %T A385535 9,3,2,7,0,0,3,5,8,8,4,7,6,4,1,1,5,7,9,1,4,5,2,5,8,0,3,3,7,2,9,5,1,6, %U A385535 0,4,0,1,8,2,3,5,5,3,2,5,3,6,8,2,7,1,7,4,8,5 %N A385535 Decimal expansion of the surface area of a biaugmented pentagonal prism with unit edge. %C A385535 The biaugmented pentagonal prism is Johnson solid J_53. %H A385535 Paolo Xausa, <a href="/A385535/b385535.txt">Table of n, a(n) for n = 1..10000</a> %H A385535 Wikipedia, <a href="https://en.wikipedia.org/wiki/Biaugmented_pentagonal_prism">Biaugmented pentagonal prism</a>. %F A385535 Equals 3 + 2*sqrt(3) + sqrt(25/4 + 5*sqrt(5)/2) = 3 + A010469 + sqrt(25/4 + 5*A002163/2). %F A385535 Equals the largest root of 256*x^8 - 6144*x^7 + 45824*x^6 - 50688*x^5 - 729376*x^4 + 2504064*x^3 - 583184*x^2 - 4746912*x + 1628761. %e A385535 9.905056416315688432572916637788963932700358847641... %t A385535 First[RealDigits[3 + Sqrt[12] + Sqrt[25/4 + 5*Sqrt[5]/2], 10, 100]] (* or *) %t A385535 First[RealDigits[PolyhedronData["J53", "SurfaceArea"], 10, 100]] %Y A385535 Cf. A385534 (volume). %Y A385535 Cf. A002163, A010469, A385510. %K A385535 nonn,cons,easy %O A385535 1,1 %A A385535 _Paolo Xausa_, Jul 03 2025