Smallest number whose cube has n digits.

Terms

a(0) =1a(1) =3a(2) =5a(3) =10a(4) =22a(5) =47a(6) =100a(7) =216a(8) =465a(9) =1000a(10) =2155a(11) =4642a(12) =10000a(13) =21545a(14) =46416a(15) =100000a(16) =215444a(17) =464159a(18) =1000000a(19) =2154435a(20) =4641589a(21) =10000000a(22) =21544347a(23) =46415889a(24) =100000000a(25) =215443470a(26) =464158884a(27) =1000000000a(28) =2154434691a(29) =4641588834