[seqfan] Re: A069570; Numbers in which the n-th digit is either a divisor or a multiple of n.
M. F. Hasler
oeis at hasler.fr
Tue Sep 27 17:17:51 CEST 2016
I think it is understood "for all n >= 1, n <= number of digits".
(and digits 0 seem to be forbidden).
I edited the definition accordingly.
--
Maximilian
On Tue, Sep 27, 2016 at 5:25 AM, David Corneth <davidacorneth at gmail.com>
wrote:
> What's this sequence supposed to be? a(21) = 23 but 23 has no 21-th digit.
>
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