

A088543


Decimal expansion of sqrt(15)/2.


6



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

1,2


COMMENTS

This is the ratio of the base of an isosceles triangle to its height when the other two sides are each equal to twice the base.
Exradius opposite the side of length 3 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.  Rick L. Shepherd, May 14 2008


LINKS

Table of n, a(n) for n=1..105.
Eric Weisstein's World of Mathematics, Exradius.


FORMULA

sqrt(15)/2 = A010472/2 = A140249/3.  Rick L. Shepherd, May 14 2008


EXAMPLE

1.93649167310370844258963269989119980541646085264579541329378688305674154596...


CROSSREFS

Cf. A010527.
Cf. A140239, A140246, A140247, A140248, A140249, A010472.
Sequence in context: A169849 A182547 A019737 * A256854 A182552 A021985
Adjacent sequences: A088540 A088541 A088542 * A088544 A088545 A088546


KEYWORD

cons,nonn


AUTHOR

Christopher M. Tomaszewski (cmt1288(AT)comcast.net), Nov 16 2003


EXTENSIONS

More terms from Rick L. Shepherd, May 14 2008


STATUS

approved



