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A187578
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Rank transform of the sequence 3*floor(n/3); complement of A187579.
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2
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1, 2, 5, 6, 7, 9, 10, 11, 14, 15, 16, 20, 21, 22, 24, 25, 26, 29, 30, 31, 33, 34, 35, 38, 39, 40, 44, 45, 46, 48, 49, 50, 53, 54, 55, 59, 60, 61, 63, 64, 65, 68, 69, 70, 72, 73, 74, 77, 78, 79, 83, 84, 85, 87, 88, 89, 92, 93, 94, 96, 97, 98, 101, 102, 103, 107, 108, 109, 111, 112, 113, 116, 117, 118, 122, 123, 124, 126, 127, 128, 131, 132, 133, 135, 136, 137, 140, 141, 142, 146
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OFFSET
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1,2
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COMMENTS
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See A187224.
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LINKS
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Table of n, a(n) for n=1..90.
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MATHEMATICA
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seqA = Table[3*Floor[n/3], {n, 1, 220}]
seqB = Table[n, {n, 1, 220}]; (*A000027*)
jointRank[{seqA_,
seqB_}] := {Flatten@Position[#1, {_, 1}],
Flatten@Position[#1, {_, 2}]} &[
Sort@Flatten[{{#1, 1} & /@ seqA, {#1, 2} & /@ seqB}, 1]];
limseqU =
FixedPoint[jointRank[{seqA, #1[[1]]}] &,
jointRank[{seqA, seqB}]][[1]] (*A187578*)
Complement[Range[Length[seqA]], limseqU] (*A187579*)
(*by Peter J. C. Moses, Mar 11 2011*)
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CROSSREFS
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Cf. A187224, A187579.
Sequence in context: A188218 A050103 A303437 * A193260 A161539 A177859
Adjacent sequences: A187575 A187576 A187577 * A187579 A187580 A187581
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling, Mar 11 2011
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STATUS
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approved
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