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%I #2 Mar 30 2012 17:26:21
%S 3,4,5,6,8,10,12,14,15,16,18,19,20,22,23,24,26,27,28,30,32,34,35,36,
%T 38,40,42,43,44,46,48,50,51,52,54,56,58,59,60,62,63,64,66,67,68,70,72,
%U 74,75,76,78,79,80,82,83,84,86,88,90,91,92,94,95,96,98,99,100
%N Increasing sequence: "if n appears a*n+b does not", case a(1)=3, a=2, b=1.
%t s={3};With[{a=2,b=1},Do[If[FreeQ[s,(n-b)/a],AppendTo[s,n]],{n,4,100}]];s
%Y Cf. A121538, A121539, A121541, A121542.
%K nonn
%O 1,1
%A _Zak Seidov_, Aug 08 2006
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