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A033160
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Begins with (2, 4); avoids 3-term arithmetic progressions.
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5
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2, 4, 5, 7, 11, 13, 14, 16, 29, 31, 32, 34, 38, 40, 41, 43, 83, 85, 86, 88, 92, 94, 95, 97, 110, 112, 113, 115, 119, 121, 122, 124, 245, 247, 248, 250, 254, 256, 257, 259, 272, 274, 275, 277, 281, 283, 284, 286, 326, 328, 329, 331, 335, 337, 338, 340, 353, 355, 356, 358, 362
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..61.
F. Iacobescu, Smarandache Partition Type and Other Sequences, Bull. Pure Appl. Sci. 16E, 237-240, 1997.
H. Ibstedt, A Few Smarandache Sequences, Smarandache Notions Journal, Vol. 8, No. 1-2-3, 1997, 170-183.
Eric Weisstein's World of Mathematics, Nonarithmetic Progression Sequence
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MATHEMATICA
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Select[Range[1000], MatchQ[IntegerDigits[#-2, 3], {(0|1)..., 0|2}]&] (* Jean-François Alcover, Jan 13 2019, after Tanya Khovanova in A186776 *)
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CROSSREFS
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a(n) = A186776(n)+2 = A004793(n)+1 = A033163(n)-1. Cf. A185256.
Sequence in context: A128815 A056527 A147991 * A350147 A110924 A335402
Adjacent sequences: A033157 A033158 A033159 * A033161 A033162 A033163
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane.
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STATUS
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approved
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