Index of 8^n within the sequence of the numbers of the form 6^i*8^j.

Terms

a(0) =1a(1) =3a(2) =6a(3) =10a(4) =15a(5) =21a(6) =28a(7) =37a(8) =47a(9) =58a(10) =70a(11) =83a(12) =97a(13) =113a(14) =130a(15) =148a(16) =167a(17) =187a(18) =208a(19) =231a(20) =255a(21) =280a(22) =306a(23) =333a(24) =361a(25) =391a(26) =422a(27) =454a(28) =487a(29) =521