%I #11 Jan 19 2016 21:32:43
%S 3,4,6,7,12,13,15,16,30,31,33,34,39,40,42,43,84,85,87,88,93,94,96,97,
%T 111,112,114,115,120,121,123,124,246,247,249,250,255,256,258,259,273,
%U 274,276,277,282,283,285,286,327,328,330,331,336,337,339,340,354,355,357,358,363
%N Begins with (3, 4); avoids 3-term arithmetic progressions.
%C Also: Stanley sequence S(3). - _M. F. Hasler_, Jan 18 2016
%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>
%H <a href="/index/St#Stanley">Index entries related to Stanley sequences</a>
%F a(n) = A005836(n)+3. - _M. F. Hasler_, Jan 18 2016
%Y a(n) = A003278(n)+2
%K nonn
%O 1,1
%A _N. J. A. Sloane_.