[seqfan] Re: Number times reversal
mathstutoring at ntlworld.com
Sat Jan 7 14:01:30 CET 2012
I have put some Mathematica code for this on the sequence page and run it for n=1 to 100000.
The numbers that appear more than twice (and there could be many others) are in an attached pdf file - together with their frequency of occurrence - sent to you directly.
Hope that helps
Ant King (UK)
----- Original Message -----
From: <franktaw at netscape.net>
To: <seqfan at list.seqfan.eu>
Sent: Saturday, January 07, 2012 9:00 AM
Subject: [seqfan] Number times reversal
> https://oeis.org/A061205 is the sequence of integers multiplied by
> their digit reversals; e.g. a(12) = 12*21 = 252.
> The sequence includes the squares of palindromes times powers of 10,
> each occurring once; and products of non-palindromes and their
> reversals, each occurring twice.
> What I'm wondering is whether there are any other duplications in the
> sequence; equivalently, any number that occurs more than twice in the
> Franklin T. Adams-Watters
> Seqfan Mailing list - http://list.seqfan.eu/
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