A007421 - cp's OEIS frontend

A007421 Liouville's function: parity of number of primes dividing n (with multiplicity).

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

[2, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 2, 2, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 1, 2, 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1]

cp's OEIS Frontend

A007421 Liouville's function: parity of number of primes dividing n (with multiplicity).

Table of values

List of values

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

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

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