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A015924
Positive integers n such that 2^n == 16 (mod n).
11
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
OFFSET
1,2
COMMENTS
Odd terms are given by A033984.
For all m, 2^A128121(m)-1 belongs to this sequence.
LINKS
MATHEMATICA
Select[Range[1000], Mod[2^# - 2^4, #] == 0 &] (* T. D. Noe, Aug 17 2012 *)
Join[{1, 2, 4, 6, 7, 8, 12, 16}, Select[Range[600], PowerMod[2, #, #]==16&]] (* Harvey P. Dale, Dec 03 2021 *)
CROSSREFS
Contains A050992 as a subsequence.
Sequence in context: A358458 A014855 A298479 * A096750 A088458 A177866
KEYWORD
nonn
EXTENSIONS
Edited and terms 1,2,4,6,7,8,12,16 prepended by Max Alekseyev, Jul 29 2011
STATUS
approved