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!)
A146077 Numbers n such that gcd(n, 2^n-2) does not equal the least prime factor of n. 3
28, 35, 45, 55, 70, 77, 95, 105, 112, 115, 119, 143, 153, 154, 155, 161, 165, 175, 186, 187, 196, 203, 209, 215, 221, 225, 231, 235, 238, 247, 253, 275, 276, 280, 285, 287, 295, 299, 319, 322, 323, 325, 329, 335, 341, 345, 355, 364, 371, 377, 385, 391, 395 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Also, positive integers n where A159353(n) differs from A032742(n).

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[400], GCD[#, 2^#-2]!=FactorInteger[#][[1, 1]]&] (* Harvey P. Dale, Dec 14 2015 *)

CROSSREFS

Cf. A159353, A032742.

Sequence in context: A214470 A055576 A281916 * A260637 A143186 A101421

Adjacent sequences:  A146074 A146075 A146076 * A146078 A146079 A146080

KEYWORD

nonn

AUTHOR

Ray Chandler, Apr 11 2009

EXTENSIONS

Extended by Ray Chandler, Apr 11 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 May 27 21:52 EDT 2020. Contains 334671 sequences. (Running on oeis4.)