A373381 - cp's OEIS frontend

A373381 a(n) = gcd(bigomega(n), A056239(n)), where bigomega is number of prime factors with repetition, and A056239 is fully additive with a(p) = primepi(p).

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

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

cp's OEIS Frontend

A373381 a(n) = gcd(bigomega(n), A056239(n)), where bigomega is number of prime factors with repetition, and A056239 is fully additive with a(p) = primepi(p).

Table of values

List of values

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

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

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