login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A000209 Nearest integer to tan n. 1
0, 2, -2, 0, 1, -3, 0, 1, -7, 0, 1, -226, -1, 0, 7, -1, 0, 3, -1, 0, 2, -2, 0, 2, -2, 0, 1, -3, 0, 1, -6, 0, 1, -75, -1, 0, 8, -1, 0, 4, -1, 0, 2, -1, 0, 2, -2, 0, 1, -3, 0, 1, -6, 0, 1, -45, -1, 0, 8, -1, 0, 4, -1, 0, 2, -1, 0, 2, -2, 0, 1, -3, 0, 1, -6, 0, 1, -32, -1, 0, 9, -1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

"At lunch one day, feeling even more ebullient than usual, he [Richard Feynman] challenged the table to a competition. He bet that he could solve any problem within sixty seconds, to within ten percent accuracy, that could be stated within ten seconds. ... Under pressure, his friends found themselves unable to stump him. ... Then Paul Olum spoke up. ... He demanded the tangent of ten to the hundredth. The competition was over. ... Even Feynman could not produce that on short notice." [James Gleick, Genius, Pantheon, NY, 1992, p. 178.] - N. J. A. Sloane, Jun 25 2018

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 0..20000 (First 1000 terms from T. D. Noe)

MAPLE

Digits := 100; f := n->round(evalf(tan(n))); [ seq(f(n), n=0..100) ];

MATHEMATICA

Round[Tan[Range[0, 90]]] (* Harvey P. Dale, Aug 26 2013 *)

CROSSREFS

Sequence in context: A105524 A221459 A166387 * A170982 A296339 A104245

Adjacent sequences:  A000206 A000207 A000208 * A000210 A000211 A000212

KEYWORD

sign

AUTHOR

N. J. A. Sloane

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 17 22:28 EST 2018. Contains 317279 sequences. (Running on oeis4.)