a(n) = the largest multiple of n with n digits and exactly n divisors; a(n) = 0 if no such number exists.

A182750

a(n) = the largest multiple of n with n digits and exactly n divisors; a(n) = 0 if no such number exists.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =99999992a(8) =998117649a(9) =0a(10) =25937424601a(11) =999999999924a(12) =0a(13) =0a(14) =0a(16) =0a(18) =0a(20) =0a(21) =0a(22) =0a(25) =0a(28) =0a(29) =0a(30) =0

External references