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A187480
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Rank transform of the sequence round(n/2); complement of A187481.
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2
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1, 2, 4, 5, 6, 8, 9, 10, 11, 13, 15, 16, 17, 19, 20, 21, 22, 24, 26, 27, 28, 30, 32, 33, 34, 35, 37, 38, 39, 40, 42, 43, 44, 46, 48, 49, 50, 51, 53, 54, 55, 57, 59, 60, 61, 63, 64, 65, 66, 68, 69, 70, 71, 73, 75, 76, 77, 79, 80, 81, 82, 84, 85, 86, 87, 89, 91, 92, 93, 95, 97, 98, 99, 100, 102, 103, 104, 106, 108, 109, 110, 112, 113, 114, 115, 117, 119, 120, 121, 123, 124, 125
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OFFSET
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1,2
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COMMENTS
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See A187224. A187480 is the rank transform of (A004525 with initial two zeros removed).
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LINKS
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Table of n, a(n) for n=1..92.
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MATHEMATICA
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seqA = Table[Round[n/2], {n, 1, 180}] (* A004524 *)
seqB = Table[n, {n, 1, 80}]; (* 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]] (* A187480 *)
Complement[Range[Length[seqA]], limseqU] (* A187481 *)
(* by Peter J. C. Moses, Mar 10 2011 *)
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CROSSREFS
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Cf. A187224, A187481, A004524.
Sequence in context: A141204 A160992 A096997 * A081694 A355890 A145395
Adjacent sequences: A187477 A187478 A187479 * A187481 A187482 A187483
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling, Mar 10 2011
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STATUS
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approved
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