A076544 - cp's OEIS frontend

A076544 a(n) = mu(n) + sqf(n) where mu(n) is Moebius function, sqf(n) = 1 if n is squarefree and sqf(n) = -1 otherwise.

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

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

cp's OEIS Frontend

A076544 a(n) = mu(n) + sqf(n) where mu(n) is Moebius function, sqf(n) = 1 if n is squarefree and sqf(n) = -1 otherwise.

Table of values

List of values

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

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

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