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.

A353032

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) =0a(1) =0a(2) =4a(3) =8a(4) =81a(5) =0a(6) =0a(7) =0a(8) =441a(9) =6723a(10) =0a(11) =0a(12) =0a(13) =0a(14) =767495140624a(15) =2024a(17) =0a(18) =0a(19) =0a(20) =2050624a(21) =263168a(22) =0a(23) =0a(24) =670801950625a(25) =0a(27) =532899a(28) =0a(29) =0a(30) =0a(31) =0

External references