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A187576
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Rank transform of the sequence 2*floor((n-1)/2)); complement of A187577.
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2
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1, 2, 4, 5, 7, 8, 11, 12, 14, 15, 17, 18, 20, 21, 23, 24, 27, 28, 30, 31, 33, 34, 37, 38, 40, 41, 43, 44, 46, 47, 49, 50, 53, 54, 56, 57, 59, 60, 62, 63, 65, 66, 69, 70, 72, 73, 75, 76, 79, 80, 82, 83, 85, 86, 88, 89, 91, 92, 95, 96, 98, 99, 101, 102, 105, 106, 108, 109, 111, 112, 114, 115, 117, 118, 121, 122, 124, 125, 127, 128, 130, 131, 133, 134
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OFFSET
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1,2
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COMMENTS
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See A187224. The sequence of which A187576 is the rank transform is A052928=(0,0,2,2,4,4,6,6,8,8,...).
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LINKS
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Table of n, a(n) for n=1..84.
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MATHEMATICA
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seqA = Table[2*Floor[(n-1)/2], {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]] (*A187576*)
Complement[Range[Length[seqA]], limseqU] (*A187577*)
(*by Peter Moses, Mar 11 2011*)
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CROSSREFS
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Cf. A187224, A187577.
Sequence in context: A085370 A006693 A158850 * A188298 A206285 A112886
Adjacent sequences: A187573 A187574 A187575 * A187577 A187578 A187579
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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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