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

 

Logo

Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A066284 A066135[4n]. 4
34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 228, 34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 228, 34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 386, 34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 228, 34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 228, 34, 84, 34, 84, 34, 194 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) <= 2p, where p = A002586(4n) is the least prime factor of (1 + 16^n). (See the Comment in A066135.) - Jonathan Sondow, Nov 23 2012

LINKS

Table of n, a(n) for n=1..66.

FORMULA

a(n) = Min{x : Mod[DivisorSigma[4n, x], x]=0, x>1}.

EXAMPLE

First 3 terms correspond to entries of other sequences as follows: a(1)=A046763(2),a(2)=A055712(2), a(3)=A055716(2).

CROSSREFS

Cf. A066135, A046761-A046763, A055709-A055717, A007691, A001159.

Sequence in context: A066944 A044172 A044553 * A036199 A092223 A046764

Adjacent sequences:  A066281 A066282 A066283 * A066285 A066286 A066287

KEYWORD

nonn

AUTHOR

Labos Elemer, Dec 11 2001

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 August 28 11:28 EDT 2014. Contains 246168 sequences.