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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
OFFSET
1,1
COMMENTS
The original definition was "a(n)=ceiling[surface area of a shpere of radius n]".
LINKS
MATHEMATICA
Table[Ceiling[4 Pi n^2], {n, 1, 50}] (* Vincenzo Librandi, Feb 19 2013 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mohammad K. Azarian, Mar 02 2008
EXTENSIONS
Definition replaced by Bruno Berselli, Feb 19 2013
STATUS
approved