login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A160516 Inverse permutation to A075075. 3
1, 2, 5, 3, 6, 4, 17, 8, 10, 7, 18, 9, 23, 20, 11, 13, 24, 15, 58, 12, 16, 19, 59, 14, 33, 22, 28, 21, 62, 26, 63, 31, 29, 25, 34, 36, 66, 57, 39, 32, 67, 35, 72, 30, 27, 60, 125, 37, 49, 44, 40, 38, 126, 47, 45, 42, 71, 61, 131, 56, 134, 64, 48, 52, 80, 46, 135, 41, 76, 43 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This is a permutation of the positive integers (provided A075075 really is a permutation).

LINKS

H. v. Eitzen, Table of n, a(n) for n = 1..50000

FORMULA

A075075(a(n)) = n.

EXAMPLE

A075075(7) = 10, therefore a(10) = 7.

A075055(17) = 7, therefore a(7) = 17.

MATHEMATICA

f[s_List] := Block[{m = Numerator[s[[ -1]]/s[[ -2]]]}, k = m; While[MemberQ[s, k], k += m]; Append[s, k]]; s = Nest[f, {1, 2}, 200]; Table[ Position[s, n, 1, 1], {n, 70}] // Flatten (* Robert G. Wilson v, May 20 2009 *)

PROG

(Haskell)

import Data.List (elemIndex)

import Data.Maybe (fromJust)

a160516 = (+ 1) . fromJust . (`elemIndex` a075075_list)

-- Reinhard Zumkeller, Dec 19 2012

CROSSREFS

Cf. A185635 (fixed points).

Sequence in context: A212614 A037852 A226214 * A264105 A024871 A222072

Adjacent sequences:  A160513 A160514 A160515 * A160517 A160518 A160519

KEYWORD

nonn

AUTHOR

Hagen von Eitzen, May 16 2009

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 December 15 20:00 EST 2019. Contains 330000 sequences. (Running on oeis4.)