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 A178809 #20 Aug 21 2023 11:22:25 %S A178809 1,1,1,9,6,1,5,2,4,2,2,7,0,6,6,3,1,8,8,0,5,8,2,3,3,9,0,2,4,5,1,7,6,1, %T A178809 7,1,0,0,8,2,8,4,1,5,7,6,1,4,3,1,1,4,1,8,8,4,1,6,7,4,2,0,9,3,8,3,5,5, %U A178809 7,9,9,0,5,0,7,2,6,4,0,0,1,1,1,2,4,3,4,3,8,5,6,0,2,7,1,7,4,5,7,2,7,0,2,6,8 %N A178809 Decimal expansion of the area of the regular 12-gon (dodecagon) of edge length 1. %C A178809 Surface area of a regular hexagonal prism with unit side length and height. - _Wesley Ivan Hurt_, May 04 2021 %H A178809 G. C. Greubel, <a href="/A178809/b178809.txt">Table of n, a(n) for n = 2..10000</a> %H A178809 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a> %F A178809 Equals 6+3*sqrt(3). %F A178809 Equals 1 + A176532 = 6 + A010482. - _R. J. Mathar_, Jun 25 2010 %e A178809 11.196152422706631880582339024517617100828415761431141884167420938355... %t A178809 RealDigits[N[6+3*Sqrt[3],150]][[1]] %o A178809 (PARI) sqrt(27)+6 \\ _Charles R Greathouse IV_, Apr 25 2016 %Y A178809 Cf. A010482, A090488, A104956, A120011, A176532. %K A178809 cons,nonn,easy %O A178809 2,4 %A A178809 _Vladimir Joseph Stephan Orlovsky_, Jun 16 2010 %E A178809 Offset corrected and keyword:cons inserted by _R. J. Mathar_, Jun 25 2010