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 A384036 #28 May 22 2025 19:08:12 %S A384036 8,4,4,0,9,5,4,8,0,1,1,7,7,9,3,3,8,4,5,5,1,8,0,2,3,9,5,4,7,7,7,2,1,9, %T A384036 1,9,8,8,1,4,7,4,8,3,4,0,0,2,0,3,9,6,6,5,8,4,1,4,1,8,9,4,1,4,0,4,7,7, %U A384036 3,7,9,8,4,4,1,7,9,3,2,4,6,2,6,6,4,8,8 %N A384036 Decimal expansion of the surface area of a regular pentagonal prism of edge length 1. %F A384036 Equals 5 + (1/2)*sqrt(25 + 10*sqrt(5)). %F A384036 Minimal polynomial: 16*x^4 - 320*x^3 + 2200*x^2 - 6000*x + 5125. - _Stefano Spezia_, May 17 2025 %e A384036 8.4409548011779338455... %t A384036 RealDigits[5 + 1/2 * Sqrt(25 + 10 * Sqrt(5)), 10, 100, 0][[1]] %Y A384036 Cf. A178809. %Y A384036 Cf. A102771 (volume), A300074 (midradius), A384059 (circumradius). %K A384036 nonn,cons %O A384036 1,1 %A A384036 _Kritsada Moomuang_, May 17 2025