[seqfan] Number times reversal
franktaw at netscape.net
franktaw at netscape.net
Sat Jan 7 10:00:13 CET 2012
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
sequence.
Franklin T. Adams-Watters
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