A379908 - cp's OEIS frontend

A379908 a(n) is number of n-digit positive integers in which the product of the digits in the even positions equals the product of the digits in the odd positions.

n	a(n)
1	1
2	9
3	32
4	380
5	4097
6	54054
7	700099
8	8742818
9	108476326
10	1285917070
11	15207121743
12	173726013062
13	1982695287783
14	22061642063204
15	245374194718713
16	2677923173095450
17	29219674883924922
18	314236528160399298
19	3379020617685021774
20	35924502411735093750
21	381913758547904774763

[1, 9, 32, 380, 4097, 54054, 700099, 8742818, 108476326, 1285917070, 15207121743, 173726013062, 1982695287783, 22061642063204, 245374194718713, 2677923173095450, 29219674883924922, 314236528160399298, 3379020617685021774, 35924502411735093750, 381913758547904774763]

cp's OEIS Frontend

A379908 a(n) is number of n-digit positive integers in which the product of the digits in the even positions equals the product of the digits in the odd positions.

Table of values

List of values