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A056646 Square root of largest unitary square divisor of central binomial coefficient. 0

%I #10 Sep 04 2017 19:24:31

%S 1,1,1,1,1,2,1,1,3,6,1,2,2,1,3,3,1,2,1,2,2,1,1,2,10,5,10,5,3,12,3,3,1,

%T 2,5,10,10,5,3,6,2,1,2,1,5,20,15,30,42,21,14,7,7,28,2,1,1,4,1,4,4,2,

%U 21,21,7,14,7,14,6,3,1,2,2,1,10,5,35,140,7,14,126,63,2,1,5,20,90,45,3,12

%N Square root of largest unitary square divisor of central binomial coefficient.

%F a(n) = A000188(A001405(n))/A055229(A001405(n)) = A056056(n)/A056059(n).

%e n=28: binomial(28,14) = 2*2*2*3*3*3*5*5*17*19*23. The square root of its largest square divisor is 30, while the largest unitary analog is a(28) = 30/6 = 5.

%Y Cf. A000188, A001405, A055229, A056056, A056059.

%K nonn

%O 1,6

%A _Labos Elemer_, Aug 09 2000

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Last modified September 4 12:50 EDT 2024. Contains 375683 sequences. (Running on oeis4.)