cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A187687 Rank transform of the sequence floor(5n/3); complement of A187688.

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%I A187687 #5 Dec 04 2016 19:46:24
%S A187687 1,3,5,7,9,11,12,15,16,18,20,22,24,26,28,29,31,34,35,37,39,41,43,45,
%T A187687 46,48,50,52,54,56,58,60,62,63,65,67,69,71,73,75,77,79,80,82,84,86,88,
%U A187687 90,92,94,96,97,99,101,103,105,107,108,111,113,114,116,118,120,122,124,125,127,130,131,133,135,137,139,141,143,145,146,148,150,152
%N A187687 Rank transform of the sequence floor(5n/3); complement of A187688.
%C A187687 See A187224.
%t A187687 seqA = Table[Floor[5n/3], {n, 1, 220}]
%t A187687 seqB = Table[n, {n, 1, 220}];(*A000027*)
%t A187687 jointRank[{seqA_,
%t A187687    seqB_}] := {Flatten@Position[#1, {_, 1}],
%t A187687     Flatten@Position[#1, {_, 2}]} &[
%t A187687   Sort@Flatten[{{#1, 1} & /@ seqA, {#1, 2} & /@ seqB}, 1]];
%t A187687 limseqU =
%t A187687  FixedPoint[jointRank[{seqA, #1[[1]]}] &,
%t A187687    jointRank[{seqA, seqB}]][[1]] (*A187687*)
%t A187687 Complement[Range[Length[seqA]], limseqU]  (*A187688*)
%t A187687 (*by _Peter J. C. Moses_, Mar 12 2011*)
%Y A187687 Cf. A187224, A187688.
%K A187687 nonn
%O A187687 1,2
%A A187687 _Clark Kimberling_, Mar 12 2011