A067945 Numbers k that divide 3^k - 1.

1, 2, 4, 8, 16, 20, 32, 40, 64, 80, 100, 128, 160, 200, 220, 256, 272, 320, 328, 400, 440, 500, 512, 544, 640, 656, 800, 880, 1000, 1024, 1088, 1100, 1220, 1280, 1312, 1360, 1600, 1640, 1760, 2000, 2048, 2176, 2200, 2420, 2440, 2500, 2560, 2624, 2720, 3088

Offset

1,2

Comments

Closed under multiplication: if x and y are terms then so is x*y.

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Prog

(PARI) is(n)=Mod(3, n)^n==1 \\ Charles R Greathouse IV, Aug 01 2016

Crossrefs

Cf. A024023.

Sequence in context: A326752 A093107 A125508 * A309263 A166156 A089473

Adjacent sequences: A067942 A067943 A067944 * A067946 A067947 A067948

Keyword

easy,nonn

Author

Benoit Cloitre, Mar 05 2002

Status

approved