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Odd squares which can be expressed as the product of a number and its reversal in at least two different ways.
5

%I #28 Aug 01 2019 01:08:55

%S 1239016098321,1503617940841,1842890415961,11151144884889,

%T 12909311260209,149920947896841,181937770841761,12128839583882121,

%U 12598313930168521,12639203218972521,13081277143774921,14462953695004441,14999934809556841,15260975534573041

%N Odd squares which can be expressed as the product of a number and its reversal in at least two different ways.

%D S. S. Gupta, EPRNs, Science Today, Feb. 1987, India.

%H Chai Wah Wu, <a href="/A083407/b083407.txt">Table of n, a(n) for n = 1..126</a>

%H Shyam Sunder Gupta, <a href="http://www.shyamsundergupta.com/eporns.htm">EPRN Numbers</a>.

%e 1239016098321 = 1113111 * 1113111 = 1022121 * 1212201, etc.

%Y Cf. A066531, A083406 (even squares version), A083408 (all squares version).

%K nonn,base

%O 1,1

%A _Shyam Sunder Gupta_, Jun 07 2003

%E Corrected by Hans Havermann, Feb 13 2012

%E a(4)-a(14) (including four found by Hans Havermann) from _Donovan Johnson_, Feb 18 2012

%E Definition corrected by _N. J. A. Sloane_, Aug 01 2019