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%I #2 Mar 30 2012 16:51:06
%S 0,1,4,5,10,11,16,21,32,33,38,43,54,61,76,95,118,119,124,129,140,147,
%T 162,181,204,211,226,247,276,305,354,413,460,461,466,471,482,489,504,
%U 523,546,553,568,589,618,647,696,755,802,809,824,845,874,903,952,1013,1066,1095,1146
%N a(0)=0, a(1)=1; for n>21, a(n) = (A151725(n)+7)/4.
%C The number of cells after n generations in one quadrant of the CA in A151725.
%C The first differences (starting at a(2)) give A151737.
%Y Cf. A151746.
%K nonn
%O 0,3
%A _N. J. A. Sloane_, Jun 15 2009