Exponent of 2 (value of i) in n-th number of form 2^i*5^j.

Terms

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