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%I #11 Jun 22 2013 16:06:09
%S 13,51,114,202,315,453,616,805,1018,1257,1521,1810,2124,2464,2828,
%T 3217,3632,4072,4537,5027,5542,6083,6648,7239,7854,8495,9161,9853,
%U 10569,11310,12077,12868,13685,14527,15394,16287,17204,18146,19114,20107
%N Ceiling(4*Pi*n^2).
%C The original definition was "a(n)=ceiling[surface area of a shpere of radius n]".
%H Vincenzo Librandi, <a href="/A135971/b135971.txt">Table of n, a(n) for n = 1..1000</a>
%t Table[Ceiling[4 Pi n^2], {n, 1, 50}] (* _Vincenzo Librandi_, Feb 19 2013 *)
%Y Cf. A066643, A066644, A066645, A135039.
%K nonn,easy
%O 1,1
%A _Mohammad K. Azarian_, Mar 02 2008
%E Definition replaced by _Bruno Berselli_, Feb 19 2013