A338437 - cp's OEIS frontend

A338437 a(n) = n! * [x^n] Product_{k=1..n, gcd(n,k) = 1} 1 / (1 - x^k/k).

n	a(n)
0	1
1	1
2	2
3	9
4	32
5	300
6	864
7	17612
8	74752
9	1152792
10	6470400
11	220057992
12	719622144
13	40754156352
14	192835098624
15	4787867880000
16	55181218873344
17	3071730630989952
18	11004144881762304
19	1179255538492239744
20	5720352215040000000
21	253837962769406045184
22	3262870639485701849088

[1, 1, 2, 9, 32, 300, 864, 17612, 74752, 1152792, 6470400, 220057992, 719622144, 40754156352, 192835098624, 4787867880000, 55181218873344, 3071730630989952, 11004144881762304, 1179255538492239744, 5720352215040000000, 253837962769406045184, 3262870639485701849088]

cp's OEIS Frontend

A338437 a(n) = n! * [x^n] Product_{k=1..n, gcd(n,k) = 1} 1 / (1 - x^k/k).

Table of values

List of values