A349146 - cp's OEIS frontend

A349146 Number of ordered n-tuples (x_1, x_2, x_3, ..., x_n) such that Sum_{k=1..n} 1/x_k is an integer and x_k is an integer between 1 and n for 1 <= k <= n.

n	a(n)
0	1
1	1
2	2
3	5
4	25
5	82
6	1310
7	6757
8	73204
9	612534
10	12021898
11	100648935
12	3293923530
13	30781757528
14	543076024093
15	22444907405573
16	490532466616585
17	6321096033756031
18	293288707966712654
19	4209069624596495601
20	231798923882314673793
21	15160706809349856453181
22	265850457583646602080422
23	4542630089978045405518910

[1, 1, 2, 5, 25, 82, 1310, 6757, 73204, 612534, 12021898, 100648935, 3293923530, 30781757528, 543076024093, 22444907405573, 490532466616585, 6321096033756031, 293288707966712654, 4209069624596495601, 231798923882314673793, 15160706809349856453181, 265850457583646602080422, 4542630089978045405518910]

cp's OEIS Frontend

A349146 Number of ordered n-tuples (x_1, x_2, x_3, ..., x_n) such that Sum_{k=1..n} 1/x_k is an integer and x_k is an integer between 1 and n for 1 <= k <= n.

Table of values

List of values