A321619 - cp's OEIS frontend

A321619 Expansion of Product_{k>0} (1 - d(k)*x^k), where d(k) is the number of divisors of k.

n	a(n)
0	1
1	-1
2	-2
3	0
4	-1
5	5
6	0
7	6
8	0
9	-5
10	9
11	-14
12	-18
13	-13
14	31
15	-26
16	-3
17	-5
18	34
19	18
20	21
21	117
22	-36
23	-10
24	-64
25	52
26	-140
27	276
28	-142
29	-232
30	-456
31	-16
32	56
33	330
34	-421
35	-119
36	1055
37	-679
38	499
39	49
40	1601
41	-712
42	1199
43	-932
44	3488
45	-4640
46	1186
47	182
48	-700
49	2116
50	-1281
51	-5305
52	1983
53	1432

[1, -1, -2, 0, -1, 5, 0, 6, 0, -5, 9, -14, -18, -13, 31, -26, -3, -5, 34, 18, 21, 117, -36, -10, -64, 52, -140, 276, -142, -232, -456, -16, 56, 330, -421, -119, 1055, -679, 499, 49, 1601, -712, 1199, -932, 3488, -4640, 1186, 182, -700, 2116, -1281, -5305, 1983, 1432]

cp's OEIS Frontend

A321619 Expansion of Product_{k>0} (1 - d(k)*x^k), where d(k) is the number of divisors of k.

Table of values

List of values