Number of '1' digits in the set of all numbers from 0 to A014824(n) = Sum_{i=1..n} i*10^(n-i) = (0, 1, 12, 123, 1234, 12345, ...).

A277831

Number of '1' digits in the set of all numbers from 0 to A014824(n) = Sum_{i=1..n} i*10^(n-i) = (0, 1, 12, 123, 1234, 12345, ...).

Terms

    a(0) =0a(1) =1a(2) =5a(3) =57a(4) =689a(5) =8121a(6) =93553a(7) =1058985a(8) =11824417a(9) =130589849a(10) =1429355281a(11) =15528120716a(12) =167626886179

External references