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A187689 Rank transform of the sequence round(3n/4); complement of A187690. 2
1, 3, 4, 5, 7, 8, 10, 12, 13, 15, 16, 18, 19, 20, 22, 23, 25, 27, 28, 29, 31, 32, 34, 35, 37, 39, 40, 42, 43, 44, 46, 48, 49, 51, 52, 53, 55, 56, 58, 60, 61, 63, 64, 66, 67, 68, 70, 72, 73, 75, 76, 77, 79, 80, 82, 83, 85, 87, 88, 90, 91, 92, 94, 95, 97, 99, 100, 101, 103, 104, 106, 108, 109, 111, 112, 114, 115, 116, 118, 119, 121, 123, 124, 125, 127, 128, 130, 131, 133, 135, 136, 138, 139 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A187224.

LINKS

Table of n, a(n) for n=1..93.

MATHEMATICA

seqA = Table[Round[3n/4], {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]] (*A187689*)

Complement[Range[Length[seqA]], limseqU]  (*A187690*)

(*by Peter J. C. Moses, Mar 12 2011*)

CROSSREFS

Cf. A187224, A187690.

Sequence in context: A026347 A187482 A285950 * A137292 A089358 A173001

Adjacent sequences:  A187686 A187687 A187688 * A187690 A187691 A187692

KEYWORD

nonn

AUTHOR

Clark Kimberling, Mar 12 2011

STATUS

approved

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Last modified May 25 07:15 EDT 2020. Contains 334584 sequences. (Running on oeis4.)