login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A187411 Rank transform of the sequence floor(n*sqrt(3)); complement of A187412. 2
1, 3, 5, 7, 9, 11, 13, 14, 17, 18, 21, 22, 24, 26, 28, 30, 32, 34, 35, 37, 40, 42, 43, 45, 47, 49, 51, 53, 55, 56, 58, 60, 63, 64, 66, 68, 70, 72, 74, 76, 78, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 121, 123, 125, 127, 129, 131, 133, 135, 137, 139, 141, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 163, 165, 167, 169 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A187224.

LINKS

Table of n, a(n) for n=1..89.

MATHEMATICA

m = 3^(1/2);

seqA = Table[Floor[m*n], {n, 1, 180}]  (* A022838 *)

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]]                                      (* A187411 *)

Complement[Range[Length[seqA]], limseqU]  (* A187412 *)

(* by Peter J. C. Moses, Mar 09 2011 *)

CROSSREFS

Cf. A187224, A187412.

Sequence in context: A064996 A172277 A187472 * A189401 A091569 A206545

Adjacent sequences:  A187408 A187409 A187410 * A187412 A187413 A187414

KEYWORD

nonn

AUTHOR

Clark Kimberling, Mar 09 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 21 07:13 EDT 2021. Contains 347596 sequences. (Running on oeis4.)