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Begins with (4, 5); avoids 3-term arithmetic progressions.
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%I #9 Sep 20 2012 16:58:04

%S 4,5,7,8,13,14,16,17,31,32,34,35,40,41,43,44,85,86,88,89,94,95,97,98,

%T 112,113,115,116,121,122,124,125,247,248,250,251,256,257,259,260,274,

%U 275,277,278,283,284,286,287,328,329,331,332,337,338,340,341,355,356,358,359,364

%N Begins with (4, 5); avoids 3-term arithmetic progressions.

%D Iacobescu, F. 'Smarandache Partition Type and Other Sequences.' Bull. Pure Appl. Sci. 16E, 237-240, 1997.

%D H. Ibstedt, A Few Smarandache Sequences, Smarandache Notions Journal, Vol. 8, No. 1-2-3, 1997, 170-183.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/NonarithmeticProgressionSequence.html">Nonarithmetic Progression Sequence</a>

%Y a(n) = A003278(n)+3

%K nonn

%O 1,1

%A _N. J. A. Sloane_.