Terms share no digit with their difference (2)
Jack Brennen
jb at brennen.net
Tue Aug 7 19:08:15 CEST 2007
To strengthen the constraint, I think you also want to add that the
sequence is strictly increasing, to avoid degenerate sequences like
1, 3, 1, 3, 1, 3, ...
Eric Angelini wrote:
>
> The constraint is not complete:
> The triplet a, b and (a-b) shares no digit.
> Sorry,
> É.
>
> -------------------------------------------
>
>
> Hello seqFans,
> What could be the longest seq. where two consecutive terms
> share no digit with their difference?
>
> Some examples of (too) short such seq.:
>
> S: 1 3 5 7 9 11 20 END
> d: 2 2 2 2 2 9
>
> S: 2 3 4 5 6 7 8 9 11 33 41 63 71 93 101 END
> d: 1 1 1 1 1 1 1 2 22 8 22 8 22 8
>
> Best,
> É.
>
>
>
>
More information about the SeqFan
mailing list