A138649 a(n) = 6^n mod 5^n.

0, 1, 11, 91, 46, 1526, 15406, 45561, 117116, 312071, 1872426, 21000181, 223657336, 853662766, 5121976596, 12421312701, 74527876206, 141991475986, 2377827762166, 18081663838621, 32196037719226, 2441363034106, 491485336407761, 2948912018446566

Offset: 0

Author

N. J. A. Sloane, May 20 2008

Keywords

• nonn

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..1430

Crossrefs

Cf. k^n mod (k-1)^n: A002380 (k=3), A064629 (k=4), A138589 (k=5), this sequence (k=6), A139786 (k=7), A138973 (k=8), A139733 (k=9).

Programs

Mathematica

Table[PowerMod[6,n,5^n],{n,0,30}] (* Harvey P. Dale, Jan 23 2014 *)