Repeatedly convert from decimal to octal.

Terms

a(0) =8a(1) =10a(2) =12a(3) =14a(4) =16a(5) =20a(6) =24a(7) =30a(8) =36a(9) =44a(10) =54a(11) =66a(12) =102a(13) =146a(14) =222a(15) =336a(16) =520a(17) =1010a(18) =1762a(19) =3342a(20) =6416a(21) =14420a(22) =34124a(23) =102514a(24) =310162a(25) =1135622a(26) =4252006a(27) =20160546a(28) =114720042a(29) =665476452