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 A179047 #6 Apr 27 2025 14:06:50 %S A179047 3,8,9,7,1,1,4,3,1,7,0,2,9,9,7,3,9,1,0,4,3,6,7,5,4,2,6,8,3,8,8,2,1,2, %T A179047 8,2,5,6,2,1,3,1,1,8,2,1,0,7,3,3,5,6,4,1,3,1,2,5,5,6,5,7,0,3,7,6,6,8, %U A179047 4,9,2,8,8,0,4,4,8,0,0,0,8,3,4,3,2,5,7,8,9,2,0,2,0,3,8,0,9,2,9,5,2,7,0,1,5 %N A179047 Decimal expansion of 9*sqrt(3)/4, the area of an equilateral triangle of side length 3. %e A179047 3.89711431702997391043675426838821282562131182107335641312556570376684... %t A179047 a=b=c=3;area=Sqrt[(a+b-c)*(a-b+c)*(-a+b+c)*(a+b+c)]/4;RealDigits[N[area,200]] %t A179047 RealDigits[9 Sqrt[3]/4,10,120][[1]] (* _Harvey P. Dale_, Apr 27 2025 *) %Y A179047 Cf. A002194, A010502, A120011. %K A179047 nonn,cons,easy %O A179047 1,1 %A A179047 _Vladimir Joseph Stephan Orlovsky_, Jun 26 2010