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This sequence is also decimal expansion of cosine of 51 degrees. - Mohammad K. Azarian, Jun 29 2013
Ivan Panchenko, Table of n, a(n) for n = 0..1000
Wikipedia, Exact trigonometric constants
RealDigits[Sin[39 Degree], 10, 120][] (* Harvey P. Dale, Oct 02 2015 *)
Sequence in context: A201324 A107826 A078756 * A246967 A215261 A132826
Adjacent sequences: A019845 A019846 A019847 * A019849 A019850 A019851
N. J. A. Sloane.