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%I #17 Aug 04 2017 12:03:31
%S 1,81,100,2025,3025,9801,10000,88209,494209,998001,1000000,4941729,
%T 7441984,23804641,24502500,25502500,28005264,52881984,60481729,
%U 99980001,100000000,300814336,493817284,1518037444,6049417284,6832014336
%N Numbers n that can be chopped into two parts, which when added and squared result in n.
%H Henry Ernest Dudeney, <a href="https://archive.org/stream/AmusementsInMathematicspdf/AmusementsInMathematics#page/n29/mode/2up">Amusements in Mathematics</a>, 1917. See problem 113, "The torn number".
%F a(n) = A248353(n)^2.
%e a(7)=88209 as (88+209)^2 = 297^2 = 88209.
%Y Supersequence of A238237.
%K nonn,base
%O 1,2
%A _Bodo Zinser_, Feb 10 2005
%E a(1)=1 prepended by _Max Alekseyev_, Aug 04 2017
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