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 A187691 Rank transform of the sequence ceiling(3n/4); complement of A187692. 2

%I

%S 1,3,4,5,7,9,11,12,13,15,16,17,19,20,22,23,25,27,28,29,31,33,35,36,37,

%T 39,41,42,43,45,47,48,49,51,52,53,55,57,59,60,61,63,64,65,67,68,70,71,

%U 73,75,76,77,79,80,82,83,85,87,88,89,91,92,94,95,97,99,100,101,103,105,107,108,109,111,112,113,115,116,118,119,121,123,124,125,127,129,131,132,133,135,137,138,139

%N Rank transform of the sequence ceiling(3n/4); complement of A187692.

%C See A187224.

%t seqA = Table[Ceiling[3n/4], {n, 1, 220}]

%t seqB = Table[n, {n, 1, 220}];(*A000027*)

%t jointRank[{seqA_,

%t seqB_}] := {Flatten@Position[#1, {_, 1}],

%t Flatten@Position[#1, {_, 2}]} &[

%t Sort@Flatten[{{#1, 1} & /@ seqA, {#1, 2} & /@ seqB}, 1]];

%t limseqU =

%t FixedPoint[jointRank[{seqA, #1[[1]]}] &,

%t jointRank[{seqA, seqB}]][[1]] (*A187691*)

%t Complement[Range[Length[seqA]], limseqU] (*A187692*)

%t (*by _Peter J. C. Moses_, Mar 12 2011*)

%Y Cf. A187224, A187692.

%K nonn

%O 1,2

%A _Clark Kimberling_, Mar 12 2011

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Last modified May 28 21:37 EDT 2020. Contains 334690 sequences. (Running on oeis4.)