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A187478
Rank transform of the sequence floor(3(n-2)/2); complement of A187479.
2
1, 2, 3, 6, 8, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 28, 29, 31, 33, 35, 36, 39, 40, 42, 44, 46, 48, 49, 51, 53, 55, 57, 58, 60, 62, 64, 66, 68, 69, 71, 73, 75, 77, 79, 80, 82, 84, 86, 88, 90, 91, 93, 95, 97, 98, 101, 102, 104, 106, 108, 109, 111, 113, 115, 117, 119, 120
OFFSET
1,2
COMMENTS
See A187224. Although the first term of floor(3(n-2)/2) is negative, we can replace it by 0 without affecting the same joint rankings; thus, the procedure described at A187224 applies.
MATHEMATICA
seqA = Table[Floor[3(n-2)/2], {n, 1, 180}]
seqB = Table[n, {n, 1, 80}]; (* 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]] (* A187478 *)
Complement[Range[Length[seqA]], limseqU] (* A187479 *)
(* by Peter J. C. Moses, Mar 10 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Mar 10 2011
STATUS
approved