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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 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

Mohammad K. Azarian, Forty-Five Nested Equilateral Triangles and cosecant of 1 degree, Problem 813, College Mathematics Journal, Vol. 36, No. 5, November 2005, p. 413-414.  Solution published in Vol. 37 , No. 5, November 2006, pp. 394-395.

LINKS

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

FORMULA

Equals sum((-1)^n/(1 + n*Pi), {n, -oo, oo}). - Jean-Fran├žois 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: A219300 A200686 A222066 * A011213 A178728 A256489

Adjacent sequences:  A073444 A073445 A073446 * A073448 A073449 A073450

KEYWORD

cons,nonn

AUTHOR

Rick L. Shepherd, Aug 01 2002

STATUS

approved

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Last modified March 25 01:30 EDT 2017. Contains 284036 sequences.