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.
%I A187476 #8 Dec 26 2023 10:11:23 %S A187476 1,2,5,6,8,10,12,13,15,17,19,21,23,24,26,28,30,32,34,35,37,39,41,42, %T A187476 45,46,48,50,52,54,55,57,59,61,63,64,66,68,70,72,74,75,77,79,81,83,85, %U A187476 86,88,90,92,94,96,97,99,101,103,104,107,108,110,112,114,115,117,119 %N A187476 Rank transform of the sequence floor(3(n-1)/2); complement of A187477. %C A187476 See A187224. %t A187476 seqA = Table[Floor[3(n-1)/2], {n, 1, 180}] (* A032766 *) %t A187476 seqB = Table[n, {n, 1, 80}]; (* A000027 *) %t A187476 jointRank[{seqA_, seqB_}] := {Flatten@Position[#1, {_, 1}], %t A187476 Flatten@Position[#1, {_, 2}]} &[Sort@Flatten[{{#1, 1} & /@ seqA, %t A187476 {#1, 2} & /@ seqB}, 1]]; %t A187476 limseqU = FixedPoint[jointRank[{seqA, #1[[1]]}] &, jointRank[{seqA, seqB}]][[1]] (* A187476 *) %t A187476 Complement[Range[Length[seqA]], limseqU] (* A187477 *) %t A187476 (* by _Peter J. C. Moses_, Mar 10 2011 *) %Y A187476 Cf A187224, A187477. %K A187476 nonn %O A187476 1,2 %A A187476 _Clark Kimberling_, Mar 10 2011