A054015 - cp's OEIS frontend

A054015 a(n) is Chowla function of n read modulo (number of proper divisors of n), a(1) = 0 by convention.

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

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

cp's OEIS Frontend

A054015 a(n) is Chowla function of n read modulo (number of proper divisors of n), a(1) = 0 by convention.

Table of values

List of values

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

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

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