A277849 - cp's OEIS frontend

A277849 Number of digits '9' 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, ...).

n	a(n)
0	0
1	0
2	1
3	22
4	343
5	4664
6	58985
7	713306
8	8367627
9	96021949
10	1083676281
11	12071330713
12	133058986145
13	1454046651577
14	15775034417009
15	170096023182441
16	1824417021947873
17	19478738120713305
18	207133060219478737
19	2194787392318244180
20	23182441824417009723

[0, 0, 1, 22, 343, 4664, 58985, 713306, 8367627, 96021949, 1083676281, 12071330713, 133058986145, 1454046651577, 15775034417009, 170096023182441, 1824417021947873, 19478738120713305, 207133060219478737, 2194787392318244180, 23182441824417009723]

cp's OEIS Frontend

A277849 Number of digits '9' 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, ...).

Table of values

List of values