A281666 - cp's OEIS frontend

A281666 Expansion of Sum_{i>=1} x^(i(i+1)/2)/(1 + x^(i(i+1)/2)) * Product_{j>=1} (1 + x^(j*(j+1)/2)).

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

[1, 0, 1, 2, 0, 1, 2, 0, 2, 4, 2, 0, 2, 3, 1, 4, 3, 2, 6, 4, 3, 5, 0, 5, 9, 3, 2, 7, 6, 3, 11, 10, 0, 9, 12, 3, 11, 10, 8, 11, 8, 9, 9, 6, 12, 19, 15, 7, 15, 16, 4, 20, 21, 10, 23, 24, 10, 16, 19, 18, 20, 20, 17, 24, 27, 18, 28, 26, 19, 33, 30, 12, 33, 39, 25, 36, 38, 16, 32, 44, 29, 41, 48, 37, 41, 45, 33, 39, 44, 41]

cp's OEIS Frontend

A281666 Expansion of Sum_{i>=1} x^(i(i+1)/2)/(1 + x^(i(i+1)/2)) * Product_{j>=1} (1 + x^(j*(j+1)/2)).

Table of values

List of values

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

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

cp's OEIS Frontend

A281666 Expansion of Sum_{i>=1} x^(i*(i+1)/2)/(1 + x^(i*(i+1)/2)) * Product_{j>=1} (1 + x^(j*(j+1)/2)).

Table of values

List of values

A281666 Expansion of Sum_{i>=1} x^(i(i+1)/2)/(1 + x^(i(i+1)/2)) * Product_{j>=1} (1 + x^(j*(j+1)/2)).

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