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A187833 Rank transform of the sequence floor(3n/2-1/2); complement of A187834. 2
1, 3, 5, 6, 9, 10, 12, 14, 16, 17, 19, 21, 23, 25, 27, 28, 30, 32, 34, 36, 38, 39, 41, 43, 45, 46, 49, 50, 52, 54, 56, 58, 59, 61, 63, 65, 67, 68, 70, 72, 74, 76, 78, 79, 81, 83, 85, 87, 89, 90, 92, 94, 96, 98, 100, 101, 103, 105, 107, 108, 111, 112, 114, 116, 118, 119, 121, 123, 125, 127, 129, 130, 133, 134, 136, 138, 140, 141, 143, 145, 147, 149 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A187833 is the rank transform of the sequence A001631 of positive integers not divisible by 3.  For a discussion of rank transforms, see A187224.

LINKS

Table of n, a(n) for n=1..82.

MATHEMATICA

seqA = Table[Floor[3n/2-1/2], {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]] (*A187833*)

Complement[Range[Length[seqA]], limseqU]  (*A187834*)

(*by Peter J. C. Moses, Mar 13 2011*)

CROSSREFS

Cf. A187224, A187834.

Sequence in context: A286061 A288308 A187574 * A081121 A187837 A325428

Adjacent sequences:  A187830 A187831 A187832 * A187834 A187835 A187836

KEYWORD

nonn

AUTHOR

Clark Kimberling, Mar 13 2011

STATUS

approved

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Last modified November 20 12:13 EST 2019. Contains 329335 sequences. (Running on oeis4.)