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A019934 Decimal expansion of tangent of 36 degrees. 1
7, 2, 6, 5, 4, 2, 5, 2, 8, 0, 0, 5, 3, 6, 0, 8, 8, 5, 8, 9, 5, 4, 6, 6, 7, 5, 7, 4, 8, 0, 6, 1, 8, 7, 4, 9, 6, 1, 6, 0, 9, 2, 3, 9, 2, 9, 6, 5, 2, 0, 8, 4, 6, 2, 7, 5, 0, 0, 6, 6, 3, 2, 7, 3, 4, 5, 7, 4, 9, 3, 9, 1, 8, 4, 5, 6, 8, 3, 0, 8, 8, 4, 2, 0, 5, 7, 7, 5, 2, 2, 2, 1, 6, 1, 4, 0, 0, 9, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..98.

Anonymous, Exact trigonometric constants, Wikipedia

FORMULA

This number = sqrt[5-2*sqrt(5)]. This number * A019970 = sqrt(5) = A002163. - R. J. Mathar, Jun 18 2006

MATHEMATICA

RealDigits[Tan[36 Degree], 10, 120][[1]] (* Harvey P. Dale, Nov 06 2012 *)

CROSSREFS

Sequence in context: A128475 A225444 A175408 * A182548 A143306 A199075

Adjacent sequences:  A019931 A019932 A019933 * A019935 A019936 A019937

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified May 21 07:04 EDT 2013. Contains 225477 sequences.