login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A248948 Decimal expansion of Sum_{n >= 1} tan(1/n^2). 4
2, 2, 0, 8, 2, 5, 8, 8, 1, 3, 2, 8, 7, 1, 7, 5, 7, 0, 9, 0, 8, 4, 3, 4, 9, 6, 8, 0, 7, 3, 0, 3, 4, 7, 3, 2, 6, 2, 4, 5, 8, 6, 8, 0, 7, 4, 1, 9, 8, 7, 7, 0, 6, 7, 6, 7, 2, 7, 6, 5, 9, 9, 1, 5, 3, 9, 8, 2, 6, 6, 2, 1, 6, 3, 1, 8, 6, 9, 1, 9, 6, 5, 4, 2, 2, 4, 4, 0, 5, 0, 3, 4, 0, 3, 0, 2, 4, 2, 1, 1, 3, 4, 8, 1, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
2.208258813287175709084349680730347326245868074198770676727659915398266...
MAPLE
evalf(sum(tan(1/n^2), n=1..infinity), 120); # Vaclav Kotesovec, Oct 20 2014
MATHEMATICA
(* N[Sum[Tan[1/n^2], {n, 1, Infinity}], 120], yields only 25 correct decimals *)
PROG
(PARI) default(realprecision, 120); sumpos(n=1, tan(1/n^2)) \\ Vaclav Kotesovec, Oct 20 2014
CROSSREFS
Sequence in context: A305605 A137456 A337710 * A364288 A009187 A009803
KEYWORD
nonn,easy,cons
AUTHOR
Clark Kimberling, Oct 18 2014
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)