%I
%S 65,868591084757,6979302951885,6157577986646405,8052956026592517,
%T 8052956206592517,8650327689541457,8650349867341457,
%U 619431353040136925,619631153042134925,631688638047992345,633288858025996145,633488632647994145,653488856225994125
%N Odd rare numbers: odd n such that nr and n+r are squares, where r is the reverse of n.
%C There are 20 terms up to 10^22.  _Shyam Sunder Gupta_, Dec 14 2019
%D Shyam Sunder Gupta, "Systematic computations of rare numbers", The Mathematics Education, Vol. XXXII, No. 3, 1998.
%H Shyam Sunder Gupta, <a href="/A059755/b059755.txt">Table of n, a(n) for n = 1..20</a>
%H C. Rivera, <a href="http://www.primepuzzles.net/conjectures/conj_023.htm">Prime Puzzles Page</a>
%H Shyam Sunder Gupta, <a href="http://www.shyamsundergupta.com/rare.htm">Rare Numbers</a>
%e 6556 = 9 and 65 + 56 = 121 are both (perfect) squares.
%Y Cf. A035519.
%K nice,nonn,base
%O 1,1
%A _Shyam Sunder Gupta_, Feb 11 2001
