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a(n)=2*a(n-1), except every tenth time you multiply by 1000/512 instead of by 2.
0

%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_