OFFSET
1,3
COMMENTS
Identical to A154314 until a(51).
LINKS
Joonas Pohjonen, 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
EXAMPLE
11 is not in the sequence because 11 = 102_3.
MATHEMATICA
nop[n_] := Block[{b=3, d}, While[ Length[d = IntegerDigits[n, b]] >= b && Union[d] != Range[0, b-1], b++]; Length[d] < b]; Select[Range[0, 124], nop] (* Giovanni Resta, Mar 17 2014 *)
PROG
(PARI) isok(n) = {for (b = 3, n, d = digits(n, b); if (#vecsort(d, , 8) == b, return(0)); ); return (1); } \\ Michel Marcus, Mar 17 2014
(PARI) is(n)=for(b=3, log(n)\lambertw(log(n))+1, if(#Set(digits(n, b))==b, return(0))); 1 \\ Charles R Greathouse IV, Mar 17 2014
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Joonas Pohjonen, Mar 16 2014
STATUS
approved