Index of 3^n within the sequence of the numbers of the form 3^i*8^j (A025615).

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =9a(5) =12a(6) =16a(7) =20a(8) =25a(9) =30a(10) =36a(11) =42a(12) =49a(13) =56a(14) =64a(15) =72a(16) =81a(17) =90a(18) =100a(19) =111a(20) =122a(21) =134a(22) =146a(23) =159a(24) =172a(25) =186a(26) =200a(27) =215a(28) =230a(29) =246