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 A187839 Rank transform of the sequence floor(n*sqrt(2)-1/2); complement of A187840. 4
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 OFFSET 1,2 COMMENTS See A187224. LINKS G. C. Greubel, Table of n, a(n) for n = 1..10000 MATHEMATICA r=2^(1/2); seqA = Table[Floor[r*n-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]] (* A187839 *) Complement[Range[Length[seqA]], limseqU] (* A187840 *) (* Peter J. C. Moses, Mar 13 2011 *) CROSSREFS Cf. A187224, A187840. Sequence in context: A110133 A205647 A187903 * A183988 A175054 A154366 Adjacent sequences: A187836 A187837 A187838 * A187840 A187841 A187842 KEYWORD nonn AUTHOR Clark Kimberling, Mar 13 2011 STATUS approved

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Last modified January 31 17:23 EST 2023. Contains 359979 sequences. (Running on oeis4.)