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%I #31 Aug 01 2019 01:07:32
%S 63504,435600,6350400,7683984,16240900,25401600,43560000,66585600,
%T 420332004,558471424,635040000,647804304,726949444,768398400,
%U 782432784,1067328900,1624090000,1897473600,2341011456,2540160000
%N Even squares which can be expressed as the product of a number and its reversal in at least two different ways.
%C For n=1..49 identical to A083408.
%D S. S. Gupta, EPRNs, Science Today, Feb. 1987, India.
%H Chai Wah Wu, <a href="/A083406/b083406.txt">Table of n, a(n) for n = 1..2372</a> (first 73 terms from Hans Havermann)
%H Shyam Sunder Gupta, <a href="http://www.shyamsundergupta.com/eporns.htm">Equal Product of Reversible Numbers</a>
%e 63504 = 252 * 252 = 144 * 441, 7683984 = 2772 * 2772 = 1584 * 4851, etc.
%Y Cf. A031877, A066531, A083407 (odd squares version), A083408 (all squares version).
%K nonn,base
%O 1,1
%A _Shyam Sunder Gupta_, Jun 07 2003
%E Corrected and extended by _Hans Havermann_, Feb 11 2012
%E Definition corrected by _N. J. A. Sloane_, Aug 01 2019
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