A146077 Numbers n such that gcd(n, 2^n-2) does not equal the least prime factor of n.

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

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