A126642 - cp's OEIS frontend

A126642 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 and at least one of digits 6,7,8,9.

n	a(n)
1	5
2	25
3	125
4	601
5	2765
6	12265
7	52925
8	223801
9	932525
10	3844105
11	15722525
12	63936601
13	258902285
14	1045109545
15	4209004925
16	16921851001
17	67945160045
18	272554432585
19	1092540156125
20	4377129999001
21	17529432313805
22	70180474597225
23	280910151192125

[5, 25, 125, 601, 2765, 12265, 52925, 223801, 932525, 3844105, 15722525, 63936601, 258902285, 1045109545, 4209004925, 16921851001, 67945160045, 272554432585, 1092540156125, 4377129999001, 17529432313805, 70180474597225, 280910151192125]

cp's OEIS Frontend

A126642 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 and at least one of digits 6,7,8,9.

Table of values

List of values