n is equal to the number of 2's in all numbers <= n written in base 8.

A014886

n is equal to the number of 2's in all numbers <= n written in base 8.

Terms

    a(0) =679922a(1) =679923a(2) =679924a(3) =679925a(4) =679926a(5) =679927a(6) =679928a(7) =679929a(8) =1048576a(9) =16777216a(10) =17457138a(11) =17457139a(12) =17457140a(13) =17457141a(14) =17457142a(15) =17457143a(16) =17457144a(17) =17457145a(18) =17825792

External references