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A140239 Decimal expansion of 3*sqrt(15)/4. 16

%I #19 Aug 21 2023 10:14:58

%S 2,9,0,4,7,3,7,5,0,9,6,5,5,5,6,2,6,6,3,8,8,4,4,4,9,0,4,9,8,3,6,7,9,9,

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

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

%N Decimal expansion of 3*sqrt(15)/4.

%C Area of the obtuse scalene triangle with sides of lengths 2, 3 and 4, the scalene triangle with least integer side lengths.

%C This is the area of the ninth-smallest triangle with integer side lengths, or the eighth-smallest triangle if two smaller triangles with the same area are counted only once (see A331251). - _Hugo Pfoertner_, Feb 12 2020

%H Daniel Starodubtsev, <a href="/A140239/b140239.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>

%F 3*sqrt(15)/4 = 3*A010472/4.

%e 2.90473750965556266388444904983679970812469127896869311994068032458511231895...

%t RealDigits[(3Sqrt[15])/4,10,120][[1]] (* _Harvey P. Dale_, Apr 03 2013 *)

%Y Cf. A140240, A140241, A140242, A140243, A140244, A140245, A140246, A140247, A140248, A140249, A088543, A010472, A331250, A331251.

%K cons,nonn

%O 1,1

%A _Rick L. Shepherd_, May 14 2008

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Last modified March 29 04:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)