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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A195911 a(n) = ceiling(cot(n)). 4
1, 0, -7, 1, 0, -3, 2, 0, -2, 2, 0, -1, 3, 1, -1, 4, 1, 0, 7, 1, 0, 113, 1, 0, -7, 1, 0, -3, 2, 0, -2, 2, 0, -1, 3, 1, -1, 4, 1, 0, 7, 1, 0, 57, 1, 0, -8, 1, 0, -3, 2, 0, -2, 2, 0, -1, 3, 1, -1, 4, 1, 0, 6, 1, 0, 38, 1, 0, -8, 1, 0, -3, 2, 0, -2, 2, 0, -1, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Table[Ceiling[Cot[n]], {n, 100}] (* T. D. Noe, Mar 16 2012 *)

PROG

(PARI) a(n)=ceil(1/tan(n)) \\ Charles R Greathouse IV, Feb 07 2013

(MAGMA) [Ceiling(1/Tan(n)): n in [1..80]]; // Vincenzo Librandi, Feb 16 2013

CROSSREFS

Cf. A195910, A000503, A037448, A005657, A000493, A000480, A000494, A000484.

Sequence in context: A197037 A256778 A218620 * A231096 A240907 A179376

Adjacent sequences:  A195908 A195909 A195910 * A195912 A195913 A195914

KEYWORD

sign,easy

AUTHOR

Mohammad K. Azarian, Mar 15 2012

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 11 18:34 EST 2019. Contains 329925 sequences. (Running on oeis4.)