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A140249 Decimal expansion of 3*sqrt(15)/2. 11
5, 8, 0, 9, 4, 7, 5, 0, 1, 9, 3, 1, 1, 1, 2, 5, 3, 2, 7, 7, 6, 8, 8, 9, 8, 0, 9, 9, 6, 7, 3, 5, 9, 9, 4, 1, 6, 2, 4, 9, 3, 8, 2, 5, 5, 7, 9, 3, 7, 3, 8, 6, 2, 3, 9, 8, 8, 1, 3, 6, 0, 6, 4, 9, 1, 7, 0, 2, 2, 4, 6, 3, 7, 9, 0, 5, 4, 6, 8, 5, 5, 0, 2, 7, 8, 9, 3, 1, 0, 6, 5, 2, 8, 8, 0, 1, 0, 2, 7, 6, 8, 7, 4, 4, 5 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Exradius opposite the side of length 4 of the obtuse scalene triangle with sides of lengths 2, 3 and 4, the scalene triangle with least integer side lengths. See formulas in the Weisstein link.

LINKS

Table of n, a(n) for n=1..105.

Eric Weisstein's World of Mathematics, Exradius.

FORMULA

3*sqrt(15)/2 = 3*A010472/2 = 2*A140239 = 3*A088543 = 5*A140248.

EXAMPLE

5.80947501931112532776889809967359941624938255793738623988136064917022463790...

PROG

(PARI) 3*sqrt(15)/2

CROSSREFS

Cf. A140239, A140240, A140241, A140242, A140243, A140244, A140245, A140246, A140247, A140248, A088543, A010472.

Sequence in context: A153420 A193505 A141848 * A081564 A199073 A199069

Adjacent sequences:  A140246 A140247 A140248 * A140250 A140251 A140252

KEYWORD

cons,nonn

AUTHOR

Rick L. Shepherd, May 14 2008

STATUS

approved

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Last modified August 22 21:34 EDT 2019. Contains 326209 sequences. (Running on oeis4.)