OFFSET
1,3
COMMENTS
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
FORMULA
a(n) >> n^1.58..., where the exponent is log(3)/log(2). - Charles R Greathouse IV, Mar 17 2014
MATHEMATICA
Select[Range[0, 200], Length[Union[IntegerDigits[#, 3]]]<3&] (* Harvey P. Dale, Nov 23 2012 *)
PROG
(Haskell)
import Data.List (findIndices)
a154314 n = a154314_list !! (n-1)
a154314_list = findIndices (/= 3) a212193_list
-- Reinhard Zumkeller, May 04 2012
(PARI) is(n)=#Set(digits(n, 3))<3 \\ Charles R Greathouse IV, Mar 17 2014
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Reinhard Zumkeller, Jan 07 2009
STATUS
approved