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
KEYWORD
nonn,easy
AUTHOR
Mohammad K. Azarian, Mar 02 2008
EXTENSIONS
Definition replaced by Bruno Berselli, Feb 19 2013
STATUS
approved