Smallest k for which the number of divisors d of k such that A000005(d) = A000005(k/d) is equal to n.

A391603

Smallest k for which the number of divisors d of k such that A000005(d) = A000005(k/d) is equal to n.

Terms

    a(0) =2a(1) =1a(2) =6a(3) =36a(4) =216a(5) =1296a(6) =210a(7) =900a(8) =7560a(9) =1679616a(10) =241920a(11) =1166400a(12) =45360a(13) =810000a(14) =69300a(15) =1587600a(16) =4435200a(17) =228614400a(18) =180180a(19) =44100a(20) =30030a(21) =51438240000a(22) =9797760a(23) =914457600a(24) =5670000a(25) =2890137600a(26) =1081080a(27) =22861440000a(28) =32016600a(29) =234101145600

External references