A094921 a(n) = (6^n-1)/5 mod n.

0, 1, 1, 3, 0, 1, 1, 3, 7, 5, 1, 7, 1, 7, 10, 3, 1, 7, 1, 15, 1, 7, 1, 19, 0, 7, 16, 7, 1, 25, 1, 19, 10, 7, 15, 7, 1, 7, 4, 35, 1, 7, 1, 39, 25, 7, 1, 19, 29, 25, 43, 51, 1, 43, 15, 35, 43, 7, 1, 55, 1, 7, 43, 51, 60, 25, 1, 55, 43, 35, 1, 43, 1, 7, 25, 31, 8, 49, 1, 35, 16, 7, 1, 7, 25, 7, 43, 27

Offset

1,4

Links

Antti Karttunen, Table of n, a(n) for n = 1..20000

Mathematica

Table[Mod[(6^n-1)/5, n], {n, 90}] (* Harvey P. Dale, Nov 25 2012 *)

Prog

(PARI) A094921(n) = (((6^n-1)/5)%n); \\ Antti Karttunen, Jan 13 2025

Crossrefs

Cf. A003464.

Sequence in context: A174624 A029358 A088512 * A246522 A381096 A140166

Adjacent sequences: A094918 A094919 A094920 * A094922 A094923 A094924

Keyword

nonn

Author

N. J. A. Sloane, Jun 18 2004

Status

approved