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A187580 Rank transform of the sequence 2*floor(n/2); complement of A187581. 2
1, 3, 4, 6, 7, 9, 10, 13, 14, 16, 17, 19, 20, 22, 23, 25, 26, 29, 30, 32, 33, 35, 36, 39, 40, 42, 43, 45, 46, 48, 49, 51, 52, 55, 56, 58, 59, 61, 62, 64, 65, 67, 68, 71, 72, 74, 75, 77, 78, 81, 82, 84, 85, 87, 88, 90, 91, 93, 94, 97, 98, 100, 101, 103, 104, 107, 108, 110, 111, 113, 114, 116, 117, 119, 120, 123, 124, 126, 127, 129, 130, 132, 133, 135 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A187224.

LINKS

Table of n, a(n) for n=1..84.

MATHEMATICA

seqA = Table[2*Floor[n/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]] (*A187580*)

Complement[Range[Length[seqA]], limseqU]  (*A187581*)

(*by Peter J. C. Moses, Mar 11 2011*)

CROSSREFS

Cf. A187224, A187579.

Sequence in context: A330143 A140758 A292987 * A094178 A085795 A068675

Adjacent sequences:  A187577 A187578 A187579 * A187581 A187582 A187583

KEYWORD

nonn

AUTHOR

Clark Kimberling, Mar 11 2011

STATUS

approved

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Last modified October 1 16:22 EDT 2020. Contains 337443 sequences. (Running on oeis4.)