

A120359


Even refactorable numbers n such that the number r of odd divisors is odd, the number s of even divisors is even, both r and s are divisors of n and n is the first number for which the triple (r,s,t) occurs, where t is the number of divisors of n.


2



36, 3600, 8100, 10000, 26244, 32400, 142884, 202500, 396900, 518400, 656100, 810000, 1587600, 1679616, 2286144, 2624400, 3572100, 6350400, 9144576, 9922500, 20575296
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OFFSET

1,1


COMMENTS

Note that s is necessarily a multiple of r.


LINKS



EXAMPLE

a(1)=36 since r=3, s=6 and r+s=9.


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



