A007898 - cp's OEIS frontend

A007898 a(n) = psi_c(n), where Product_{k>1} 1/(1-1/k^s)^A007897(k) = Sum_{k>0} psi_c(k)/k^s.

n	a(n)
1	1
2	1
3	2
4	3
5	3
6	4
7	4
8	7
9	7
10	6
11	6
12	12
13	7
14	8
15	12
16	16
17	9
18	15
19	10
20	18
21	16
22	12
23	12
24	32
25	17
26	14
27	22
28	24
29	15
30	30
31	16
32	34
33	24
34	18
35	24
36	48
37	19
38	20
39	28
40	48
41	21
42	40
43	22
44	36
45	45
46	24
47	24
48	78
49	32
50	37
51	36
52	42
53	27
54	54
55	36
56	64
57	40
58	30
59	30
60	96
61	31
62	32
63	60
64	78
65	42
66	60
67	34
68	54

[1, 1, 2, 3, 3, 4, 4, 7, 7, 6, 6, 12, 7, 8, 12, 16, 9, 15, 10, 18, 16, 12, 12, 32, 17, 14, 22, 24, 15, 30, 16, 34, 24, 18, 24, 48, 19, 20, 28, 48, 21, 40, 22, 36, 45, 24, 24, 78, 32, 37, 36, 42, 27, 54, 36, 64, 40, 30, 30, 96, 31, 32, 60, 78, 42, 60, 34, 54]

cp's OEIS Frontend

A007898 a(n) = psi_c(n), where Product_{k>1} 1/(1-1/k^s)^A007897(k) = Sum_{k>0} psi_c(k)/k^s.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	3
5	3
6	4
7	4
8	7
9	7
10	6
11	6
12	12
13	7
14	8
15	12
16	16
17	9
18	15
19	10
20	18
21	16
22	12
23	12
24	32
25	17
26	14
27	22
28	24
29	15
30	30
31	16
32	34
33	24
34	18
35	24
36	48
37	19
38	20
39	28
40	48
41	21
42	40
43	22
44	36
45	45
46	24
47	24
48	78
49	32
50	37
51	36
52	42
53	27
54	54
55	36
56	64
57	40
58	30
59	30
60	96
61	31
62	32
63	60
64	78
65	42
66	60
67	34
68	54

n	a(n)
1	1
2	1
3	2
4	3
5	3
6	4
7	4
8	7
9	7
10	6
11	6
12	12
13	7
14	8
15	12
16	16
17	9
18	15
19	10
20	18
21	16
22	12
23	12
24	32
25	17
26	14
27	22
28	24
29	15
30	30
31	16
32	34
33	24
34	18
35	24
36	48
37	19
38	20
39	28
40	48
41	21
42	40
43	22
44	36
45	45
46	24
47	24
48	78
49	32
50	37
51	36
52	42
53	27
54	54
55	36
56	64
57	40
58	30
59	30
60	96
61	31
62	32
63	60
64	78
65	42
66	60
67	34
68	54

n	a(n)
1	1
2	1
3	2
4	3
5	3
6	4
7	4
8	7
9	7
10	6
11	6
12	12
13	7
14	8
15	12
16	16
17	9
18	15
19	10
20	18
21	16
22	12
23	12
24	32
25	17
26	14
27	22
28	24
29	15
30	30
31	16
32	34
33	24
34	18
35	24
36	48
37	19
38	20
39	28
40	48
41	21
42	40
43	22
44	36
45	45
46	24
47	24
48	78
49	32
50	37
51	36
52	42
53	27
54	54
55	36
56	64
57	40
58	30
59	30
60	96
61	31
62	32
63	60
64	78
65	42
66	60
67	34
68	54