A070965 - cp's OEIS frontend

A070965 a(1) = 1; a(n+1) = sum{k|n} a(k) * mu(k), where the sum is over the positive divisors, k, of n; and mu(k) is the Moebius function.

n	a(n)
1	1
2	1
3	0
4	1
5	0
6	1
7	1
8	0
9	0
10	1
11	1
12	0
13	1
14	0
15	-1
16	0
17	0
18	1
19	1
20	0
21	1
22	1
23	0
24	1
25	1
26	1
27	0
28	1
29	-1
30	2
31	-1
32	2
33	0
34	0
35	0
36	0
37	1
38	0
39	-1
40	-1
41	1
42	0
43	1
44	0
45	0
46	0
47	0
48	1
49	1
50	0
51	1
52	2
53	0
54	1
55	1
56	1
57	-1
58	-1
59	0
60	1
61	-1
62	2
63	3
64	1
65	0
66	0
67	1
68	0
69	0
70	1
71	-1
72	2
73	1
74	0
75	-1
76	0
77	-1
78	-2
79	2
80	-1
81	1
82	1
83	0
84	1
85	1
86	2
87	1
88	3
89	0
90	1
91	-1
92	-2
93	0
94	2
95	2
96	2
97	1
98	0
99	-1
100	0
101	1
102	0
103	2
104	-1
105	0

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

cp's OEIS Frontend

A070965 a(1) = 1; a(n+1) = sum{k|n} a(k) * mu(k), where the sum is over the positive divisors, k, of n; and mu(k) is the Moebius function.

Table of values

List of values

n	a(n)
1	1
2	1
3	0
4	1
5	0
6	1
7	1
8	0
9	0
10	1
11	1
12	0
13	1
14	0
15	-1
16	0
17	0
18	1
19	1
20	0
21	1
22	1
23	0
24	1
25	1
26	1
27	0
28	1
29	-1
30	2
31	-1
32	2
33	0
34	0
35	0
36	0
37	1
38	0
39	-1
40	-1
41	1
42	0
43	1
44	0
45	0
46	0
47	0
48	1
49	1
50	0
51	1
52	2
53	0
54	1
55	1
56	1
57	-1
58	-1
59	0
60	1
61	-1
62	2
63	3
64	1
65	0
66	0
67	1
68	0
69	0
70	1
71	-1
72	2
73	1
74	0
75	-1
76	0
77	-1
78	-2
79	2
80	-1
81	1
82	1
83	0
84	1
85	1
86	2
87	1
88	3
89	0
90	1
91	-1
92	-2
93	0
94	2
95	2
96	2
97	1
98	0
99	-1
100	0
101	1
102	0
103	2
104	-1
105	0

n	a(n)
1	1
2	1
3	0
4	1
5	0
6	1
7	1
8	0
9	0
10	1
11	1
12	0
13	1
14	0
15	-1
16	0
17	0
18	1
19	1
20	0
21	1
22	1
23	0
24	1
25	1
26	1
27	0
28	1
29	-1
30	2
31	-1
32	2
33	0
34	0
35	0
36	0
37	1
38	0
39	-1
40	-1
41	1
42	0
43	1
44	0
45	0
46	0
47	0
48	1
49	1
50	0
51	1
52	2
53	0
54	1
55	1
56	1
57	-1
58	-1
59	0
60	1
61	-1
62	2
63	3
64	1
65	0
66	0
67	1
68	0
69	0
70	1
71	-1
72	2
73	1
74	0
75	-1
76	0
77	-1
78	-2
79	2
80	-1
81	1
82	1
83	0
84	1
85	1
86	2
87	1
88	3
89	0
90	1
91	-1
92	-2
93	0
94	2
95	2
96	2
97	1
98	0
99	-1
100	0
101	1
102	0
103	2
104	-1
105	0

n	a(n)
1	1
2	1
3	0
4	1
5	0
6	1
7	1
8	0
9	0
10	1
11	1
12	0
13	1
14	0
15	-1
16	0
17	0
18	1
19	1
20	0
21	1
22	1
23	0
24	1
25	1
26	1
27	0
28	1
29	-1
30	2
31	-1
32	2
33	0
34	0
35	0
36	0
37	1
38	0
39	-1
40	-1
41	1
42	0
43	1
44	0
45	0
46	0
47	0
48	1
49	1
50	0
51	1
52	2
53	0
54	1
55	1
56	1
57	-1
58	-1
59	0
60	1
61	-1
62	2
63	3
64	1
65	0
66	0
67	1
68	0
69	0
70	1
71	-1
72	2
73	1
74	0
75	-1
76	0
77	-1
78	-2
79	2
80	-1
81	1
82	1
83	0
84	1
85	1
86	2
87	1
88	3
89	0
90	1
91	-1
92	-2
93	0
94	2
95	2
96	2
97	1
98	0
99	-1
100	0
101	1
102	0
103	2
104	-1
105	0