Exponent of 5 (value of j) in n-th number of form 3^i*5^j.

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =1a(5) =2a(6) =0a(7) =1a(8) =2a(9) =0a(10) =3a(11) =1a(12) =2a(13) =0a(14) =3a(15) =1a(16) =4a(17) =2a(18) =0a(19) =3a(20) =1a(21) =4a(22) =2a(23) =0a(24) =5a(25) =3a(26) =1a(27) =4a(28) =2a(29) =0