[seqfan] Re: Digit of a(n) is the difference of two digits of a(n)

[franktaw at netscape.net]

The question is, if the largest digit is there more than once, are all 
the instances immune to being the difference of two digits, or does 
there then have to be a zero digit?

Franklin T. Adams-Watters

-----Original Message-----
From: Marc LeBrun <mlb at well.com>
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
Sent: Sat, Dec 7, 2013 6:58 pm
Subject: [seqfan] Re: Digit of a(n) is the difference of two digits of 
a(n)


>="franktaw at netscape.net" <franktaw at netscape.net>
> If numbers have infinitely many zeros on the left, every number has
this
> property.

Franklin T. Adams-Watters

Doh, right!

> Suppose we instead require only that every digit except the largest
must be
> the difference of two digits? (There remains the question of
how to handle
> having the largest digit present more than once.) This
trivially includes all
> single-digit numbers, but it also includes
things like 12, 24, 1235, etc.


Can't any of the digits be replicated any number of times?



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