a(n) is the least number k with exactly n proper divisors, where all of them have binary weights that are different from the binary weight of k.

A383364

a(n) is the least number k with exactly n proper divisors, where all of them have binary weights that are different from the binary weight of k.

Terms

    a(0) =1a(1) =3a(2) =25a(3) =15a(4) =81a(5) =63a(6) =15625a(7) =231a(8) =1225a(9) =405a(10) =59049a(11) =495a(12) =531441a(13) =5103a(14) =2025a(15) =1485a(17) =2475a(19) =6237a(20) =18225a(21) =295245a(22) =31381059609a(23) =4095a(24) =1500625a(25) =2657205a(26) =81225a(27) =25515a(29) =14175a(31) =21735a(32) =31236921a(33) =301327047

External references