

A073447


Decimal expansion of csc 1.


14



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

1,3


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

Table of n, a(n) for n=1..105.


FORMULA

Equals sum((1)^n/(1 + n*Pi), {n, oo, oo}).  JeanFrançois Alcover, Mar 21 2013.


EXAMPLE

1.18839510577812121626159945237...


PROG

(PARI) 1/sin(1)


CROSSREFS

Cf. A049469 (sin(1)=1/A073447), A049470 (cos(1)), A049471 (tan(1)), A073448 (sec(1)), A073449 (cot(1)).
Sequence in context: A222066 A303617 A296428 * A011213 A178728 A256489
Adjacent sequences: A073444 A073445 A073446 * A073448 A073449 A073450


KEYWORD

cons,nonn


AUTHOR

Rick L. Shepherd, Aug 01 2002


STATUS

approved



