A195385 Decimal expansion of normalized Philo sum, Philo(ABC,I), where I=incenter of a 2,sqrt(5),3 right triangle ABC.

6, 1, 1, 5, 5, 8, 3, 5, 1, 2, 7, 9, 6, 6, 4, 1, 3, 0, 6, 5, 6, 7, 7, 9, 3, 2, 2, 4, 2, 8, 8, 4, 4, 3, 2, 7, 0, 7, 7, 7, 0, 6, 7, 2, 5, 0, 0, 1, 8, 5, 3, 0, 9, 3, 1, 9, 2, 6, 0, 2, 3, 8, 0, 2, 9, 1, 7, 4, 6, 7, 0, 8, 6, 0, 9, 1, 9, 8, 1, 4, 4, 8, 1, 2, 6, 1, 1, 2, 9, 5, 1, 3, 1, 2, 6, 9, 9, 1, 5, 3, 7, 8, 6, 5, 4

Offset: 0

Author

Clark Kimberling, Sep 17 2011

Keywords

• nonn
• cons

Comments

See A195284 for definitions and a general discussion.

Examples

			Philo(ABC,I)=0.6115583512796641306567793224288443270777...
		

Crossrefs

Cf. A195284.

Programs

Mathematica

a = 2; b = Sqrt[5]; c = 3; f = 2 a*b/(a + b + c);
x1 = Simplify[f*Sqrt[a^2 + (b + c)^2]/(b + c) ]
x2 = Simplify[f*Sqrt[b^2 + (c + a)^2]/(c + a) ]
x3 = f*Sqrt[2]
N[x1, 100]
RealDigits[%]   (* (A) A195381 *)
N[x2, 100]
RealDigits[%]   (* (B) A195383 *)
N[x3, 100]
RealDigits[%]   (* (C) A195384 *)
N[(x1 + x2 + x3)/(a + b + c), 100]
RealDigits[%]   (* Philo(ABC,I) A195385 *)

Extensions

a(99) corrected by Georg Fischer, Jul 18 2021