A161528 - cp's OEIS frontend

A161528 Expansion of the q-series Sum_{n >= 0} (-1)^nq^(n(n+1)/2)(1-q)(1-q^2)...(1-q^n)/((1-q^(n+1))(1-q^(n+2))...(1-q^(2n+1))).

n	a(n)
0	1
1	0
2	2
3	1
4	0
5	0
6	2
7	1
8	2
9	0
10	0
11	0
12	2
13	0
14	2
15	2
16	1
17	0
18	0
19	0
20	2
21	0
22	0
23	2
24	3
25	0
26	2
27	0
28	0
29	0
30	2
31	0
32	0
33	0
34	2
35	2
36	2
37	0
38	2
39	1
40	0
41	0
42	2
43	0
44	0
45	0
46	0
47	2
48	2
49	0
50	2
51	1
52	2
53	0
54	2
55	0
56	2
57	0
58	0
59	0
60	0
61	0
62	2
63	2
64	0
65	0
66	2
67	0
68	4
69	0
70	0
71	2
72	3
73	0
74	0
75	0
76	0
77	0
78	0
79	2
80	2
81	0
82	0
83	0
84	2
85	0
86	2
87	2
88	1
89	0
90	4
91	0
92	2
93	0
94	0
95	0
96	0
97	0
98	2
99	2

[1, 0, 2, 1, 0, 0, 2, 1, 2, 0, 0, 0, 2, 0, 2, 2, 1, 0, 0, 0, 2, 0, 0, 2, 3, 0, 2, 0, 0, 0, 2, 0, 0, 0, 2, 2, 2, 0, 2, 1, 0, 0, 2, 0, 0, 0, 0, 2, 2, 0, 2, 1, 2, 0, 2, 0, 2, 0, 0, 0, 0, 0, 2, 2, 0, 0, 2, 0, 4, 0, 0, 2, 3, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 2, 0, 2, 2, 1, 0, 4, 0, 2, 0, 0, 0, 0, 0, 2, 2]

cp's OEIS Frontend

A161528 Expansion of the q-series Sum_{n >= 0} (-1)^nq^(n(n+1)/2)(1-q)(1-q^2)...(1-q^n)/((1-q^(n+1))(1-q^(n+2))...(1-q^(2n+1))).

Table of values

List of values

n	a(n)
0	1
1	0
2	2
3	1
4	0
5	0
6	2
7	1
8	2
9	0
10	0
11	0
12	2
13	0
14	2
15	2
16	1
17	0
18	0
19	0
20	2
21	0
22	0
23	2
24	3
25	0
26	2
27	0
28	0
29	0
30	2
31	0
32	0
33	0
34	2
35	2
36	2
37	0
38	2
39	1
40	0
41	0
42	2
43	0
44	0
45	0
46	0
47	2
48	2
49	0
50	2
51	1
52	2
53	0
54	2
55	0
56	2
57	0
58	0
59	0
60	0
61	0
62	2
63	2
64	0
65	0
66	2
67	0
68	4
69	0
70	0
71	2
72	3
73	0
74	0
75	0
76	0
77	0
78	0
79	2
80	2
81	0
82	0
83	0
84	2
85	0
86	2
87	2
88	1
89	0
90	4
91	0
92	2
93	0
94	0
95	0
96	0
97	0
98	2
99	2

n	a(n)
0	1
1	0
2	2
3	1
4	0
5	0
6	2
7	1
8	2
9	0
10	0
11	0
12	2
13	0
14	2
15	2
16	1
17	0
18	0
19	0
20	2
21	0
22	0
23	2
24	3
25	0
26	2
27	0
28	0
29	0
30	2
31	0
32	0
33	0
34	2
35	2
36	2
37	0
38	2
39	1
40	0
41	0
42	2
43	0
44	0
45	0
46	0
47	2
48	2
49	0
50	2
51	1
52	2
53	0
54	2
55	0
56	2
57	0
58	0
59	0
60	0
61	0
62	2
63	2
64	0
65	0
66	2
67	0
68	4
69	0
70	0
71	2
72	3
73	0
74	0
75	0
76	0
77	0
78	0
79	2
80	2
81	0
82	0
83	0
84	2
85	0
86	2
87	2
88	1
89	0
90	4
91	0
92	2
93	0
94	0
95	0
96	0
97	0
98	2
99	2

n	a(n)
0	1
1	0
2	2
3	1
4	0
5	0
6	2
7	1
8	2
9	0
10	0
11	0
12	2
13	0
14	2
15	2
16	1
17	0
18	0
19	0
20	2
21	0
22	0
23	2
24	3
25	0
26	2
27	0
28	0
29	0
30	2
31	0
32	0
33	0
34	2
35	2
36	2
37	0
38	2
39	1
40	0
41	0
42	2
43	0
44	0
45	0
46	0
47	2
48	2
49	0
50	2
51	1
52	2
53	0
54	2
55	0
56	2
57	0
58	0
59	0
60	0
61	0
62	2
63	2
64	0
65	0
66	2
67	0
68	4
69	0
70	0
71	2
72	3
73	0
74	0
75	0
76	0
77	0
78	0
79	2
80	2
81	0
82	0
83	0
84	2
85	0
86	2
87	2
88	1
89	0
90	4
91	0
92	2
93	0
94	0
95	0
96	0
97	0
98	2
99	2