OFFSET
1,6
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..20000
MATHEMATICA
Table[Mod[(4^n-1)/3, n], {n, 100}] (* Harvey P. Dale, Apr 11 2013 *)
PROG
(PARI) A094919(n) = ((((4^n)-1)/3)%n); \\ Antti Karttunen, Feb 18 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 18 2004
STATUS
approved