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 A195397 #5 Mar 30 2012 18:57:45 %S A195397 1,6,1,1,7,6,7,4,0,2,9,5,1,5,5,7,4,3,0,1,9,6,1,7,7,6,1,9,1,3,8,6,0,9, %T A195397 9,2,5,6,8,5,5,0,2,6,1,9,9,8,1,8,8,6,9,5,5,2,9,0,1,9,7,4,2,0,0,4,3,5, %U A195397 5,4,8,1,6,0,9,6,5,5,3,2,4,7,8,8,4,1,0,7,5,4,1,4,8,3,9,4,0,5,3,0 %N A195397 Decimal expansion of shortest length, (C), of segment from side CA through incenter to side CB in right triangle ABC with sidelengths (a,b,c)=(sqrt(3),sqrt(5),sqrt(8)). %C A195397 See A195284 for definitions and a general discussion. %e A195397 (C)=1.6117674029515574301961776191386099256... %t A195397 a = Sqrt[3]; b = Sqrt[5]; c = Sqrt[8]; %t A195397 f = 2 a*b/(a + b + c); %t A195397 x1 = Simplify[f*Sqrt[a^2 + (b + c)^2]/(b + c) ] %t A195397 x2 = Simplify[f*Sqrt[b^2 + (c + a)^2]/(c + a) ] %t A195397 x3 = f*Sqrt[2] %t A195397 N[x1, 100] %t A195397 RealDigits[%] (* (A) A195395 *) %t A195397 N[x2, 100] %t A195397 RealDigits[%] (* (B) A195396 *) %t A195397 N[x3, 100] %t A195397 RealDigits[%] (* (C) A195397 *) %t A195397 N[(x1 + x2 + x3)/(a + b + c), 100] %t A195397 RealDigits[%] (* Philo(ABC,I) A195398 *) %Y A195397 Cf. A195284. %K A195397 nonn,cons %O A195397 1,2 %A A195397 _Clark Kimberling_, Sep 17 2011