Smallest number whose seventh power has at least n digits.

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =4a(5) =6a(6) =8a(7) =10a(8) =14a(9) =20a(10) =27a(11) =38a(12) =52a(13) =72a(14) =100a(15) =139a(16) =194a(17) =269a(18) =373a(19) =518a(20) =720a(21) =1000a(22) =1390a(23) =1931a(24) =2683a(25) =3728a(26) =5180a(27) =7197a(28) =10000a(29) =13895