A338438 - cp's OEIS frontend

A338438 a(n) = n! * [x^n] Product_{k=1..n, gcd(n,k) = 1} (1 + x^k/k!).

n	a(n)
0	1
1	1
2	0
3	3
4	4
5	15
6	6
7	168
8	64
9	171
10	130
11	44418
12	804
13	802750
14	2380
15	683595
16	5782144
17	840363295
18	40410
19	24358246734
20	221953840
21	3114081516
22	5372831860
23	62269802986834
24	25703183400
25	548547778815000
26	3028000483716
27	9604167089258628
28	30673543523224
29	13242158988496348746

[1, 1, 0, 3, 4, 15, 6, 168, 64, 171, 130, 44418, 804, 802750, 2380, 683595, 5782144, 840363295, 40410, 24358246734, 221953840, 3114081516, 5372831860, 62269802986834, 25703183400, 548547778815000, 3028000483716, 9604167089258628, 30673543523224, 13242158988496348746]

cp's OEIS Frontend

A338438 a(n) = n! * [x^n] Product_{k=1..n, gcd(n,k) = 1} (1 + x^k/k!).

Table of values

List of values