a(n) is the smallest number m with n divisors such that m + 1 has n + 1 divisors; or 0 if no such number exists.

A343144

a(n) is the smallest number m with n divisors such that m + 1 has n + 1 divisors; or 0 if no such number exists.

Terms

    a(0) =1a(1) =3a(2) =9a(3) =15a(4) =0a(5) =63a(6) =729a(7) =195a(8) =96393124a(9) =0a(10) =59049a(11) =0a(12) =0a(13) =0a(14) =58564a(15) =65535a(16) =0a(17) =0a(18) =0a(19) =18224a(21) =0a(23) =456975a(25) =0a(26) =8990453124a(27) =0a(28) =0a(29) =0

External references