%I #2 Mar 30 2012 19:00:23
%S 1,1,2,1,1,2,1,1,2,2,1,2,1,1,2,1,1,2,1,1,2,1,1,2,2,1,2,1,1,3
%N a(n) = the number of natural numbers m with n steps of iterations of {r - (smallest prime divisor of r)} needed to reach 0 starting at r = m .
%C See A055843, A175126 and A175127.
%e Example (a(7)=2): There are two natural numbers 14 and 15 with 7 steps in this iteration. 14-2=12, 12-2=10, 10-2=8, 8-2=6, 6-2=4, 4-2=2, 2-2=0; 15-3=12, 12-2=10, 10-2=8, 8-2=6, 6-2=4, 4-2=2, 2-2=0.
%K nonn
%O 2,3
%A _Jaroslav Krizek_, Feb 15 2010
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