A035184 - cp's OEIS frontend

A035184 a(n) = Sum_{d|n} Kronecker(-1, d).

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

[1, 2, 0, 3, 2, 0, 0, 4, 1, 4, 0, 0, 2, 0, 0, 5, 2, 2, 0, 6, 0, 0, 0, 0, 3, 4, 0, 0, 2, 0, 0, 6, 0, 4, 0, 3, 2, 0, 0, 8, 2, 0, 0, 0, 2, 0, 0, 0, 1, 6, 0, 6, 2, 0, 0, 0, 0, 4, 0, 0, 2, 0, 0, 7, 4, 0, 0, 6, 0, 0, 0, 4, 2, 4, 0, 0, 0, 0, 0, 10, 1, 4, 0, 0, 4, 0, 0, 0, 2, 4, 0, 0, 0, 0, 0, 0, 2, 2, 0, 9, 2, 0, 0, 8, 0]

cp's OEIS Frontend

A035184 a(n) = Sum_{d|n} Kronecker(-1, d).

Table of values

List of values

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

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

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