[seqfan] Re: A055198 comment seems wrong
njasloane at gmail.com
Tue Mar 15 03:20:33 CET 2022
The definition of A055198 involves the operation of "add 4 and reverse
digits" (see A003608)
You said: Today I was looking at reproducing A055198 concerning iteratively
and add 4.
But the order matters! Start with 6 and you get either 1 or 10. Could
this explain the disagreement?
Neil J. A. Sloane, Chairman, OEIS Foundation.
Also Visiting Scientist, Math. Dept., Rutgers University,
Email: njasloane at gmail.com
On Mon, Mar 14, 2022 at 10:12 PM Sean A. Irvine <sairvin at gmail.com> wrote:
> Today I was looking at reproducing A055198 concerning iteratively reverse
> and add 4.
> The first comment seems to imply that the sequence is likely complete, yet
> I find many more terms.
> For example, 1011 repeats after 90 iterations and so should be in the
> sequence. No term of the iteration is less than 1011.
> Likewise, 1013, 1015, and many other numbers.
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