Number of '6' 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, ...).

A277836

Number of '6' 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) =0a(2) =1a(3) =22a(4) =343a(5) =4664a(6) =58986a(7) =713315a(8) =8367717a(9) =96022849a(10) =1083685281a(11) =12071420713a(12) =133059886145

External references