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A015924 Positive integers n such that 2^n == 16 (mod n). 9
1, 2, 4, 6, 7, 8, 12, 16, 20, 24, 28, 40, 44, 48, 52, 60, 68, 76, 80, 92, 112, 116, 120, 124, 148, 154, 164, 172, 188, 204, 208, 212, 236, 240, 244, 264, 268, 280, 284, 292, 316, 332, 340, 356, 364, 388, 404, 412, 428, 436, 452, 508, 520, 524, 548, 556, 596 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Odd terms are given by A033984.

For all m, 2^A128121(m)-1 belongs to this sequence.

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

OEIS Wiki, 2^n mod n

MATHEMATICA

Select[Range[1000], Mod[2^# - 2^4, #] == 0 &] (* T. D. Noe, Aug 17 2012 *)

CROSSREFS

Contains A050992 as a subsequence.

Cf. A033984, A173138.

Sequence in context: A330943 A014855 A298479 * A096750 A088458 A177866

Adjacent sequences:  A015921 A015922 A015923 * A015925 A015926 A015927

KEYWORD

nonn

AUTHOR

Robert G. Wilson v

EXTENSIONS

Edited and terms 1,2,4,6,7,8,12,16 prepended by Max Alekseyev, Jul 29 2011

STATUS

approved

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Last modified February 28 08:20 EST 2020. Contains 332321 sequences. (Running on oeis4.)