a(n) is the least k such that there are exactly n divisors d of k for which k/d-d is prime.

Terms

a(0) =1a(1) =3a(2) =8a(3) =18a(4) =60a(5) =150a(6) =210a(7) =420a(8) =390a(9) =840a(10) =7770a(11) =5460a(12) =9282a(13) =2310a(14) =3570a(15) =2730a(16) =10710a(17) =39270a(18) =117810a(19) =60060a(20) =154770a(21) =43890a(22) =53130a(23) =46410a(24) =66990a(25) =62790a(26) =176358a(27) =106260a(28) =30030a(29) =642180