OFFSET
0,1
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 0..10000
FORMULA
a(n) = if n<3 then 2 - n else 3*a(floor(n/3)) + 2 - n mod 3.
PROG
(PARI) a(n) = 3^(if(n, logint(n, 3))+1) - 1 - n; \\ Kevin Ryde, Jul 16 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jan 20 2010
STATUS
approved