

A049471


Decimal expansion of tan 1.


7



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

1,2


REFERENCES

Mohammad K. Azarian, FortyFive Nested Equilateral Triangles and cosecant of 1 degree, Problem 813, College Mathematics Journal, Vol. 36, No. 5, November 2005, p. 413414. Solution published in Vol. 37, No. 5, November 2006, pp. 394395.


LINKS

Harry J. Smith, Table of n, a(n) for n = 1..20000


EXAMPLE

1.5574077246549022305...


PROG

(PARI) { default(realprecision, 20080); x=tan(1); for (n=1, 20000, d=floor(x); x=(xd)*10; write("b049471.txt", n, " ", d)); } \\ Harry J. Smith, Jun 13 2009


CROSSREFS

Cf. A093178 Continued fraction. A009001.  Harry J. Smith, Jun 13 2009
Sequence in context: A061382 A113272 A222392 * A049789 A234473 A011500
Adjacent sequences: A049468 A049469 A049470 * A049472 A049473 A049474


KEYWORD

cons,easy,nonn


AUTHOR

Albert du Toit (dutwa(AT)intekom.co.za), N. J. A. Sloane


STATUS

approved



