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

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A071887 Conjectured values of n whose trajectory under map x -> A002487(x)*A002487(x+1) does not go into a cycle. 3
37, 38, 41, 54, 57, 58 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Why isn't 42 in this list? It does not enter a cycle in under 100 iterations which is as far as I could check. [Sean A. Irvine, Oct 05 2011]

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Cf. A002487, A070871, A071884, A071885, A071886.

Sequence in context: A190839 A185698 A043611 * A168143 A111043 A041683

Adjacent sequences:  A071884 A071885 A071886 * A071888 A071889 A071890

KEYWORD

nonn,more

AUTHOR

J. H. Conway, Jun 10 2002

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified December 22 17:45 EST 2014. Contains 252365 sequences.