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%I #6 Sep 04 2017 19:24:38
%S 1,1,1,1,1,4,1,1,9,36,1,4,4,1,9,9,1,4,1,4,4,1,1,4,100,25,100,25,9,144,
%T 9,9,1,4,25,100,100,25,9,36,4,1,4,1,25,400,225,900,1764,441,196,49,49,
%U 784,4,1,1,16,1,16,16,4,441,441,49,196,49,196,36,9,1,4,4,1,100,25,1225
%N Largest unitary square divisor of central binomial coefficient.
%F a(n) = A008833(A001405(n))/A055229(A001405(n))^2 = A056057(n)/A056059(n)^2.
%e n=28: binomial(28,14) = 2*2*2*3*3*3*5*5*17*19*23. Its largest square divisor is 900, while a(28) = 900/6^2 = 25 is the unitary analog, the largest unitary square divisor.
%Y Cf. A000188, A001405, A008833, A055229, A056056, A056057, A056059.
%K nonn
%O 1,6
%A _Labos Elemer_, Aug 09 2000
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