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A140247
Decimal expansion of 8/sqrt(15).
12
2, 0, 6, 5, 5, 9, 1, 1, 1, 7, 9, 7, 7, 2, 8, 9, 0, 0, 5, 4, 2, 8, 9, 4, 1, 5, 4, 6, 5, 5, 0, 6, 1, 3, 1, 2, 5, 7, 7, 7, 5, 5, 8, 2, 4, 2, 8, 2, 2, 1, 8, 1, 7, 7, 4, 1, 8, 0, 0, 3, 9, 3, 4, 1, 9, 2, 7, 1, 9, 0, 9, 8, 2, 3, 6, 6, 3, 8, 8, 8, 1, 7, 8, 7, 6, 9, 5, 3, 2, 6, 7, 6, 5, 7, 9, 5, 9, 2, 0, 9, 5, 5, 5, 3, 6
OFFSET
1,1
COMMENTS
Circumradius 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
Eric Weisstein's World of Mathematics, Circumradius.
FORMULA
8/sqrt(15) = 8/A010472.
EXAMPLE
2.06559111797728900542894154655061312577755824282218177418003934192719098236...
MATHEMATICA
RealDigits[8/Sqrt[15], 10, 120][[1]] (* Harvey P. Dale, May 06 2012 *)
PROG
(PARI) 8/sqrt(15)
CROSSREFS
Equals sqrt(A331227(10)/A331228(10)) = sqrt(A331227(11)/A331228(11)), A331254, A331255, A331256 (list of triangles with integer sides sorted by circumradius).
Sequence in context: A199464 A189961 A211241 * A271170 A111520 A326040
KEYWORD
cons,nonn
AUTHOR
Rick L. Shepherd, May 14 2008
STATUS
approved