A316788 - cp's OEIS frontend

A316788 Expansion of Product_{k>=1} (1 - x^(k(k+1)/2)) / (1 + x^(k(k+1)/2)).

n	a(n)
0	1
1	-2
2	2
3	-4
4	6
5	-6
6	6
7	-6
8	6
9	-4
10	0
11	2
12	-2
13	6
14	-10
15	6
16	-2
17	2
18	2
19	-10
20	16
21	-18
22	18
23	-22
24	26
25	-18
26	10
27	-12
28	4
29	10
30	-14
31	18
32	-22
33	24
34	-26
35	18
36	-8
37	6
38	6
39	-24
40	28
41	-34
42	44
43	-38
44	30
45	-28
46	14
47	2
48	-10
49	22
50	-28
51	36
52	-50
53	38
54	-30
55	44
56	-28
57	0
58	2
59	-10
60	34
61	-54
62	66
63	-66
64	70
65	-82
66	60

[1, -2, 2, -4, 6, -6, 6, -6, 6, -4, 0, 2, -2, 6, -10, 6, -2, 2, 2, -10, 16, -18, 18, -22, 26, -18, 10, -12, 4, 10, -14, 18, -22, 24, -26, 18, -8, 6, 6, -24, 28, -34, 44, -38, 30, -28, 14, 2, -10, 22, -28, 36, -50, 38, -30, 44, -28, 0, 2, -10, 34, -54, 66, -66, 70, -82, 60]

cp's OEIS Frontend

A316788 Expansion of Product_{k>=1} (1 - x^(k(k+1)/2)) / (1 + x^(k(k+1)/2)).

Table of values

List of values

n	a(n)
0	1
1	-2
2	2
3	-4
4	6
5	-6
6	6
7	-6
8	6
9	-4
10	0
11	2
12	-2
13	6
14	-10
15	6
16	-2
17	2
18	2
19	-10
20	16
21	-18
22	18
23	-22
24	26
25	-18
26	10
27	-12
28	4
29	10
30	-14
31	18
32	-22
33	24
34	-26
35	18
36	-8
37	6
38	6
39	-24
40	28
41	-34
42	44
43	-38
44	30
45	-28
46	14
47	2
48	-10
49	22
50	-28
51	36
52	-50
53	38
54	-30
55	44
56	-28
57	0
58	2
59	-10
60	34
61	-54
62	66
63	-66
64	70
65	-82
66	60

n	a(n)
0	1
1	-2
2	2
3	-4
4	6
5	-6
6	6
7	-6
8	6
9	-4
10	0
11	2
12	-2
13	6
14	-10
15	6
16	-2
17	2
18	2
19	-10
20	16
21	-18
22	18
23	-22
24	26
25	-18
26	10
27	-12
28	4
29	10
30	-14
31	18
32	-22
33	24
34	-26
35	18
36	-8
37	6
38	6
39	-24
40	28
41	-34
42	44
43	-38
44	30
45	-28
46	14
47	2
48	-10
49	22
50	-28
51	36
52	-50
53	38
54	-30
55	44
56	-28
57	0
58	2
59	-10
60	34
61	-54
62	66
63	-66
64	70
65	-82
66	60

cp's OEIS Frontend

A316788 Expansion of Product_{k>=1} (1 - x^(k*(k+1)/2)) / (1 + x^(k*(k+1)/2)).

Table of values

List of values

A316788 Expansion of Product_{k>=1} (1 - x^(k(k+1)/2)) / (1 + x^(k(k+1)/2)).

n	a(n)
0	1
1	-2
2	2
3	-4
4	6
5	-6
6	6
7	-6
8	6
9	-4
10	0
11	2
12	-2
13	6
14	-10
15	6
16	-2
17	2
18	2
19	-10
20	16
21	-18
22	18
23	-22
24	26
25	-18
26	10
27	-12
28	4
29	10
30	-14
31	18
32	-22
33	24
34	-26
35	18
36	-8
37	6
38	6
39	-24
40	28
41	-34
42	44
43	-38
44	30
45	-28
46	14
47	2
48	-10
49	22
50	-28
51	36
52	-50
53	38
54	-30
55	44
56	-28
57	0
58	2
59	-10
60	34
61	-54
62	66
63	-66
64	70
65	-82
66	60