Decimal part of n-th root of a(n) starts with digit 7.

Terms

a(0) =3a(1) =5a(2) =9a(3) =15a(4) =25a(5) =42a(6) =70a(7) =119a(8) =202a(9) =343a(10) =583a(11) =991a(12) =1684a(13) =2863a(14) =4867a(15) =8273a(16) =14064a(17) =23908a(18) =40643a(19) =69092a(20) =117457a(21) =199676a(22) =339449a(23) =577063a(24) =981007a(25) =1667712a(26) =2835110a(27) =4819686a(28) =8193466a(29) =13928892