a(n) is the smallest number m with exactly n divisors whose first digit equals the first digit of m.

A357300

a(n) is the smallest number m with exactly n divisors whose first digit equals the first digit of m.

Terms

    a(0) =1a(1) =10a(2) =100a(3) =108a(4) =120a(5) =180a(6) =1040a(7) =1020a(8) =1170a(9) =1008a(10) =1260a(11) =1680a(12) =10010a(13) =10530a(14) =10200a(15) =10260a(16) =10560a(17) =10800a(18) =11340a(19) =10920a(20) =12600a(21) =10080a(22) =15840a(23) =18480a(24) =15120a(25) =102060a(26) =104400a(27) =101640a(28) =100320a(29) =102600

External references