OFFSET
1,2
COMMENTS
Conjecture: a(n) is a permutation of the natural numbers.
LINKS
Hans Havermann, Table of n, a(n) for n = 1..10000
EXAMPLE
1/6 = .1666... (1 and 6)
6/13 = .461538461538... (1, 3 and 6)
13/17 = .76470588235294117647058823529411... (1,3 and 7)
Note that term 4 is not 10 because 13/10 = 1.3 (no zero)
MATHEMATICA
t=1; s={1}; Do[c=1; d=IntegerDigits[t]; While[f=Flatten[RealDigits[t/c][[1]]]; u=Union[IntegerDigits[c], d]; Union[Table[MemberQ[f, u[[i]]], {i, Length[u]}]]!={True}||MemberQ[s, c], c++]; t=c; AppendTo[s, t], {400}]; s
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Hans Havermann, Dec 15 2015
STATUS
approved