A328918 - cp's OEIS frontend

A328918 a(n) is the number of ordered pairs of positive integers (x, y) with x + y = 10^n, where x and y each have exactly n-digits but with initial zero digits allowed, and as strings, x and y are permutations of each other.

n	a(n)
1	1
2	1
3	11
4	11
5	281
6	281
7	11181
8	11181
9	563131
10	563131
11	32795191
12	32795191
13	2103687091
14	2103687091
15	144420919291
16	144420919291
17	10421915468041
18	10421915468041
19	781300466839541
20	781300466839541
21	60358948031151561
22	60358948031151561
23	4777791013174712961

[1, 1, 11, 11, 281, 281, 11181, 11181, 563131, 563131, 32795191, 32795191, 2103687091, 2103687091, 144420919291, 144420919291, 10421915468041, 10421915468041, 781300466839541, 781300466839541, 60358948031151561, 60358948031151561, 4777791013174712961]

cp's OEIS Frontend

A328918 a(n) is the number of ordered pairs of positive integers (x, y) with x + y = 10^n, where x and y each have exactly n-digits but with initial zero digits allowed, and as strings, x and y are permutations of each other.

Table of values

List of values