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A033984
Odd integers n such that 2^n == 16 (mod n).
15
1, 7, 40369, 673663, 990409, 1697609, 2073127, 6462649, 7527199, 7559479, 14421169, 21484129, 37825753, 57233047, 130647919, 141735559, 179203369, 188967289, 218206489, 259195009, 264538057, 277628449, 330662479, 398321239, 501126487
OFFSET
1,2
COMMENTS
The odd terms of A015924.
For all m, 2^A128121(m)-1 belongs to this sequence.
LINKS
Max Alekseyev, Table of n, a(n) for n = 1..790 (all terms below 10^14)
MATHEMATICA
Select[Range[1, 510000001, 2], PowerMod[2, #, #]==16&] (* Harvey P. Dale, Dec 11 2010 *)
CROSSREFS
Besides initial terms, the sequence coincides with A173138.
Sequence in context: A158898 A210846 A068251 * A368065 A348643 A123062
KEYWORD
nonn
AUTHOR
Joe K. Crump (joecr(AT)carolina.rr.com)
EXTENSIONS
Edited and terms 1,7 prepended by Max Alekseyev, Aug 09 2012
STATUS
approved