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%I #12 Jul 15 2021 09:15:07
%S 91304347826086956521739130434782608695652173913043478261,
%T 121739130434782608695652173913043478260869565217391304348,
%U 152173913043478260869565217391304347826086956521739130435,182608695652173913043478260869565217391304347826086956522
%N Numbers k such that k^2 is the concatenation of two numbers m and 7*m.
%H Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/NonRecursions.html">Non Recursions</a>
%Y Cf. A102567, A106497, A115527 - A115556.
%K nonn,base
%O 1,1
%A _Giovanni Resta_, Jan 25 2006
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