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%I #8 Nov 22 2014 00:07:12
%S 16,30730,3727084,3127636818781854350,7536101752216453484,
%T 52452254824270668843034,260517421591511559294554416,
%U 20815875053039440273965644350185324640
%N Numbers whose squares remain squares when prepended with 5 and appended with 25 in base 10.
%e 30730^2 = 944332900, 594433290025 = 770995^2.
%o (PARI) isok(n) = issquare(eval(concat(5, concat(Str(n^2), 25)))); \\ _Michel Marcus_, Nov 20 2014
%Y Cf. A249968, A249969, A249970.
%K nonn,base
%O 1,1
%A _Chai Wah Wu_, Nov 19 2014
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