[seqfan] Re: Fractions with no repeated digits.

[M. F. Hasler]

PS: see oeis.org/A328277 for more and correct row & col. 11. (Sorry!)

On Thu, Oct 10, 2019 at 5:41 PM M. F. Hasler <seqfan at hasler.fr> wrote:

> On Thu, Oct 10, 2019 at 11:09 AM M. F. Hasler wrote:
>
>> T(m,k) = #{ t  s.t. concat(t*m, t*k) has no digit twice (or more)}
>> Then it's always finite since we must have concat(t*m, t*k) < 9876543210.
>> and  T(m,k) = T(k,m)  and  T(m,m) = 0  so one could/should impose k < m
>>
> For this table, with 1 <= n <= m, I find
> 304, (m=2)
> 153, 157,
> 197, 124, 97,
> 221, 156, 69, 171,
> 73, 88, 142, 68, 69,
> 129, 73, 81, 86, 62, 46,
> 189, 88, 40, 67, 48, 51, 24,
> 89, 80, 77, 31, 63, 68, 41, 20,  (m=9)
> 0, 132, 80, 90, 58, 32, 63, 99, 37, (m=10)
>