The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A068535 Numbers k such that 2^k mod k = 2^k mod k^2. 4
 1, 2, 4, 8, 16, 32, 35, 64, 128, 256, 297, 512, 1024, 1093, 2048, 2186, 2590, 3279, 3511, 4096, 4372, 5465, 6558, 7022, 7651, 8192, 8744, 9837, 10533, 10930, 13116, 14044, 14209, 16384, 21066, 23175, 24012, 24577, 26592, 28088, 31599, 32768, 35110, 38621, 42132 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Sequence contains all numbers of the form 2^k (A000079) but also many others as the subsequence of primes in A001220. LINKS Amiram Eldar, Table of n, a(n) for n = 1..72 MATHEMATICA Select[Range[33000], PowerMod[2, #, #]==PowerMod[2, #, #^2]&] (* Harvey P. Dale, Oct 29 2017 *) CROSSREFS Cf. A000079, A001220, A125773, A125774, A125775. Sequence in context: A337696 A045603 A072011 * A272034 A356382 A051505 Adjacent sequences: A068532 A068533 A068534 * A068536 A068537 A068538 KEYWORD easy,nonn AUTHOR Benoit Cloitre, Mar 22 2002 EXTENSIONS More terms from Amiram Eldar, Jun 19 2022 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 10 19:25 EDT 2024. Contains 375058 sequences. (Running on oeis4.)