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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A135971 Ceiling(4*Pi*n^2). 2
 13, 51, 114, 202, 315, 453, 616, 805, 1018, 1257, 1521, 1810, 2124, 2464, 2828, 3217, 3632, 4072, 4537, 5027, 5542, 6083, 6648, 7239, 7854, 8495, 9161, 9853, 10569, 11310, 12077, 12868, 13685, 14527, 15394, 16287, 17204, 18146, 19114, 20107 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The original definition was "a(n)=ceiling[surface area of a shpere of radius n]". LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Table[Ceiling[4 Pi n^2], {n, 1, 50}] (* Vincenzo Librandi, Feb 19 2013 *) CROSSREFS Cf. A066643, A066644, A066645, A135039. Sequence in context: A050491 A332589 A022283 * A146143 A108919 A002792 Adjacent sequences: A135968 A135969 A135970 * A135972 A135973 A135974 KEYWORD nonn,easy AUTHOR Mohammad K. Azarian, Mar 02 2008 EXTENSIONS Definition replaced by Bruno Berselli, Feb 19 2013 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.

Last modified October 3 11:12 EDT 2023. Contains 365861 sequences. (Running on oeis4.)