A207642 - cp's OEIS frontend

A207642 Expansion of g.f.: Sum_{n>=0} x^n * Product_{k=0..n-1} (1 + x^(n+k)).

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	2
6	2
7	3
8	3
9	2
10	4
11	4
12	4
13	4
14	5
15	6
16	6
17	6
18	6
19	8
20	9
21	8
22	10
23	10
24	10
25	12
26	14
27	14
28	14
29	15
30	16
31	19
32	20
33	20
34	22
35	24
36	24
37	26
38	28
39	30
40	34
41	34
42	35
43	38
44	40
45	42
46	46
47	50
48	50
49	54
50	58
51	60
52	63
53	66
54	70
55	76
56	80
57	84
58	88
59	92
60	96
61	102
62	108
63	112
64	120
65	126
66	131
67	140
68	146
69	151

[1, 1, 2, 1, 2, 2, 2, 3, 3, 2, 4, 4, 4, 4, 5, 6, 6, 6, 6, 8, 9, 8, 10, 10, 10, 12, 14, 14, 14, 15, 16, 19, 20, 20, 22, 24, 24, 26, 28, 30, 34, 34, 35, 38, 40, 42, 46, 50, 50, 54, 58, 60, 63, 66, 70, 76, 80, 84, 88, 92, 96, 102, 108, 112, 120, 126, 131, 140, 146, 151]

cp's OEIS Frontend

A207642 Expansion of g.f.: Sum_{n>=0} x^n * Product_{k=0..n-1} (1 + x^(n+k)).

Table of values

List of values

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	2
6	2
7	3
8	3
9	2
10	4
11	4
12	4
13	4
14	5
15	6
16	6
17	6
18	6
19	8
20	9
21	8
22	10
23	10
24	10
25	12
26	14
27	14
28	14
29	15
30	16
31	19
32	20
33	20
34	22
35	24
36	24
37	26
38	28
39	30
40	34
41	34
42	35
43	38
44	40
45	42
46	46
47	50
48	50
49	54
50	58
51	60
52	63
53	66
54	70
55	76
56	80
57	84
58	88
59	92
60	96
61	102
62	108
63	112
64	120
65	126
66	131
67	140
68	146
69	151

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	2
6	2
7	3
8	3
9	2
10	4
11	4
12	4
13	4
14	5
15	6
16	6
17	6
18	6
19	8
20	9
21	8
22	10
23	10
24	10
25	12
26	14
27	14
28	14
29	15
30	16
31	19
32	20
33	20
34	22
35	24
36	24
37	26
38	28
39	30
40	34
41	34
42	35
43	38
44	40
45	42
46	46
47	50
48	50
49	54
50	58
51	60
52	63
53	66
54	70
55	76
56	80
57	84
58	88
59	92
60	96
61	102
62	108
63	112
64	120
65	126
66	131
67	140
68	146
69	151

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	2
6	2
7	3
8	3
9	2
10	4
11	4
12	4
13	4
14	5
15	6
16	6
17	6
18	6
19	8
20	9
21	8
22	10
23	10
24	10
25	12
26	14
27	14
28	14
29	15
30	16
31	19
32	20
33	20
34	22
35	24
36	24
37	26
38	28
39	30
40	34
41	34
42	35
43	38
44	40
45	42
46	46
47	50
48	50
49	54
50	58
51	60
52	63
53	66
54	70
55	76
56	80
57	84
58	88
59	92
60	96
61	102
62	108
63	112
64	120
65	126
66	131
67	140
68	146
69	151