Smallest number whose ninth power has at least n digits.

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =3a(5) =4a(6) =5a(7) =6a(8) =8a(9) =10a(10) =13a(11) =17a(12) =22a(13) =28a(14) =36a(15) =47a(16) =60a(17) =78a(18) =100a(19) =130a(20) =167a(21) =216a(22) =279a(23) =360a(24) =465a(25) =600a(26) =775a(27) =1000a(28) =1292a(29) =1669