A033984 Odd integers n such that 2^n == 16 (mod n).

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.

Cf. A015924, A173138, A173572.

Sequence in context: A158898 A210846 A068251 * A368065 A348643 A123062

Adjacent sequences: A033981 A033982 A033983 * A033985 A033986 A033987

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