A333809 - cp's OEIS frontend

A333809 G.f.: Sum_{k>=1} (-1)^(k + 1) * x^(k*(k + 1)) / (1 - x^k).

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

[0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 2, 0, 1, 1, 1, -1, 2, 0, 1, 0, 1, 0, 2, -1, 1, 2, 1, -1, 2, 0, 2, 0, 1, 0, 2, 0, 1, 0, 1, -1, 3, 0, 1, -1, 1, 1, 2, -1, 1, 0, 2, 0, 2, 0, 1, 0, 1, 0, 3, -1, 2, 0, 1, -1, 2, 2, 1, -2, 1, 0, 3, -1, 2, 0, 1, -1, 2, 0, 1, 0, 2, 0, 2, -2, 1, 2]

cp's OEIS Frontend

A333809 G.f.: Sum_{k>=1} (-1)^(k + 1) * x^(k*(k + 1)) / (1 - x^k).

Table of values

List of values

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

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

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