%I #5 Mar 31 2012 20:02:07
%S 1,2,4,8,16,32,64,128,256,512,1000,2000,4000,8000,16000,32000,64000,
%T 128000,256000,512000,1000000,2000000,4000000,8000000,16000000,
%U 32000000,64000000,128000000,256000000,512000000,1000000000,2000000000
%N a(n)=2*a(n-1), except every tenth time you multiply by 1000/512 instead of by 2.
%Y Cf. A000079.
%K easy,nonn
%O 0,2
%A _J. Lowell_