Decimal part of cube root of a(n) starts with 6: first term of runs.

Terms

a(0) =18a(1) =47a(2) =98a(3) =176a(4) =288a(5) =439a(6) =637a(7) =885a(8) =1192a(9) =1561a(10) =2001a(11) =2516a(12) =3113a(13) =3797a(14) =4575a(15) =5452a(16) =6435a(17) =7530a(18) =8742a(19) =10078a(20) =11544a(21) =13145a(22) =14887a(23) =16778a(24) =18822a(25) =21025a(26) =23394a(27) =25935a(28) =28653a(29) =31555