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 A195428 Decimal expansion of normalized Philo sum, Philo(ABC,G), where G=centroid of the 7,24,25 right triangle ABC. 5
 5, 4, 7, 5, 5, 9, 7, 9, 0, 6, 2, 3, 7, 4, 8, 1, 9, 4, 9, 7, 8, 0, 9, 9, 1, 0, 4, 0, 6, 1, 8, 1, 2, 0, 6, 8, 9, 4, 1, 2, 4, 9, 9, 2, 3, 2, 7, 6, 0, 9, 9, 2, 1, 5, 8, 8, 6, 0, 5, 9, 9, 6, 3, 0, 0, 6, 9, 2, 9, 4, 7, 9, 9, 8, 3, 8, 6, 1, 5, 7, 2, 0, 0, 1, 0, 8, 4, 5, 1, 6, 4, 1, 2, 8, 5, 3, 7, 7, 6, 6 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS See A195304 for definitions and a general discussion. LINKS EXAMPLE Philo(ABC,G)=0.5475597906237481949780991040618120... MATHEMATICA a = 7; b = 24; h = 2 a/3; k = b/3; f[t_] := (t - a)^2 + ((t - a)^2) ((a*k - b*t)/(a*h - a*t))^2 s = NSolve[D[f[t], t] == 0, t, 150] f1 = (f[t])^(1/2) /. Part[s, 4] RealDigits[%, 10, 100] (* (A) A195425 *) f[t_] := (t - a)^2 + ((t - a)^2) (k/(h - t))^2 s = NSolve[D[f[t], t] == 0, t, 150] f2 = (f[t])^(1/2) /. Part[s, 4] RealDigits[%, 10, 100] (* (B) A195426 *) f[t_] := (b*t/a)^2 + ((b*t/a)^2) ((a*h - a*t)/(b*t - a*k))^2 s = NSolve[D[f[t], t] == 0, t, 150] f3 = (f[t])^(1/2) /. Part[s, 1] RealDigits[%, 10, 100] (* (C) A195427 *) c = Sqrt[a^2 + b^2]; (f1 + f2 + f3)/(a + b + c) RealDigits[%, 10, 100] (* Philo(ABC, G) A195428 *) CROSSREFS Cf. A195304. Sequence in context: A177161 A154776 A188932 * A254373 A343564 A004446 Adjacent sequences:  A195425 A195426 A195427 * A195429 A195430 A195431 KEYWORD nonn,cons AUTHOR Clark Kimberling, Sep 18 2011 STATUS approved

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Last modified December 3 22:32 EST 2021. Contains 349468 sequences. (Running on oeis4.)