a(n) is the smallest k which has exactly 2*n divisors d such that tau(k) = tau(k/d + d).

A391496

a(n) is the smallest k which has exactly 2*n divisors d such that tau(k) = tau(k/d + d).

Terms

    a(0) =1a(1) =2a(2) =21a(3) =75a(4) =675a(5) =3195a(6) =22707a(7) =189375a(8) =363051a(9) =2035075a(10) =5409459a(11) =8714795a(12) =78840203a(13) =143367875a(14) =120435875a(15) =598942539

External references