A126645 - cp's OEIS frontend

A126645 a(n) is the number of integers k less than 10^n such that the decimal representation of k lacks the digits 1,2,3,4 and 5, at least one of digits 6,7 and at least one of digits 8,9.

n	a(n)
1	5
2	21
3	77
4	261
5	845
6	2661
7	8237
8	25221
9	76685
10	232101
11	700397
12	2109381
13	6344525
14	19066341
15	57264557
16	171924741
17	516036365
18	1548633381
19	4646948717
20	13942943301
21	41833024205
22	125507461221
23	376539160877
24	1129651037061
25	3389020220045
26	10167194877861

[5, 21, 77, 261, 845, 2661, 8237, 25221, 76685, 232101, 700397, 2109381, 6344525, 19066341, 57264557, 171924741, 516036365, 1548633381, 4646948717, 13942943301, 41833024205, 125507461221, 376539160877, 1129651037061, 3389020220045, 10167194877861]

cp's OEIS Frontend

A126645 a(n) is the number of integers k less than 10^n such that the decimal representation of k lacks the digits 1,2,3,4 and 5, at least one of digits 6,7 and at least one of digits 8,9.

Table of values

List of values