A335427 - cp's OEIS frontend

A335427 a(1) = 0; for k >= 2, a(prime(k)) = 0, a(k^2) = 2 * a(k); otherwise a(n) = a(A334870(n)) + 1.

n	a(n)
1	0
2	1
3	0
4	2
5	0
6	1
7	0
8	3
9	0
10	1
11	0
12	4
13	0
14	1
15	2
16	4
17	0
18	1
19	0
20	6
21	2
22	1
23	0
24	5
25	0
26	1
27	2
28	10
29	0
30	3
31	0
32	5
33	2
34	1
35	4
36	2
37	0
38	1
39	2
40	7
41	0
42	3
43	0
44	18
45	4
46	1
47	0
48	6
49	0
50	1
51	2
52	34
53	0
54	3
55	4
56	11
57	2
58	1
59	0
60	8
61	0
62	1
63	8
64	6
65	4
66	3
67	0
68	66
69	2
70	5
71	0
72	3
73	0
74	1
75	2
76	130
77	8
78	3
79	0
80	8
81	0
82	1
83	0
84	12
85	4
86	1
87	2
88	19
89	0
90	5
91	8
92	258
93	2
94	1
95	4
96	7
97	0
98	1
99	16
100	2
101	0
102	3
103	0
104	35
105	6

[0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 4, 0, 1, 2, 4, 0, 1, 0, 6, 2, 1, 0, 5, 0, 1, 2, 10, 0, 3, 0, 5, 2, 1, 4, 2, 0, 1, 2, 7, 0, 3, 0, 18, 4, 1, 0, 6, 0, 1, 2, 34, 0, 3, 4, 11, 2, 1, 0, 8, 0, 1, 8, 6, 4, 3, 0, 66, 2, 5, 0, 3, 0, 1, 2, 130, 8, 3, 0, 8, 0, 1, 0, 12, 4, 1, 2, 19, 0, 5, 8, 258, 2, 1, 4, 7, 0, 1, 16, 2, 0, 3, 0, 35, 6]

cp's OEIS Frontend

A335427 a(1) = 0; for k >= 2, a(prime(k)) = 0, a(k^2) = 2 * a(k); otherwise a(n) = a(A334870(n)) + 1.

Table of values

List of values

n	a(n)
1	0
2	1
3	0
4	2
5	0
6	1
7	0
8	3
9	0
10	1
11	0
12	4
13	0
14	1
15	2
16	4
17	0
18	1
19	0
20	6
21	2
22	1
23	0
24	5
25	0
26	1
27	2
28	10
29	0
30	3
31	0
32	5
33	2
34	1
35	4
36	2
37	0
38	1
39	2
40	7
41	0
42	3
43	0
44	18
45	4
46	1
47	0
48	6
49	0
50	1
51	2
52	34
53	0
54	3
55	4
56	11
57	2
58	1
59	0
60	8
61	0
62	1
63	8
64	6
65	4
66	3
67	0
68	66
69	2
70	5
71	0
72	3
73	0
74	1
75	2
76	130
77	8
78	3
79	0
80	8
81	0
82	1
83	0
84	12
85	4
86	1
87	2
88	19
89	0
90	5
91	8
92	258
93	2
94	1
95	4
96	7
97	0
98	1
99	16
100	2
101	0
102	3
103	0
104	35
105	6

n	a(n)
1	0
2	1
3	0
4	2
5	0
6	1
7	0
8	3
9	0
10	1
11	0
12	4
13	0
14	1
15	2
16	4
17	0
18	1
19	0
20	6
21	2
22	1
23	0
24	5
25	0
26	1
27	2
28	10
29	0
30	3
31	0
32	5
33	2
34	1
35	4
36	2
37	0
38	1
39	2
40	7
41	0
42	3
43	0
44	18
45	4
46	1
47	0
48	6
49	0
50	1
51	2
52	34
53	0
54	3
55	4
56	11
57	2
58	1
59	0
60	8
61	0
62	1
63	8
64	6
65	4
66	3
67	0
68	66
69	2
70	5
71	0
72	3
73	0
74	1
75	2
76	130
77	8
78	3
79	0
80	8
81	0
82	1
83	0
84	12
85	4
86	1
87	2
88	19
89	0
90	5
91	8
92	258
93	2
94	1
95	4
96	7
97	0
98	1
99	16
100	2
101	0
102	3
103	0
104	35
105	6

n	a(n)
1	0
2	1
3	0
4	2
5	0
6	1
7	0
8	3
9	0
10	1
11	0
12	4
13	0
14	1
15	2
16	4
17	0
18	1
19	0
20	6
21	2
22	1
23	0
24	5
25	0
26	1
27	2
28	10
29	0
30	3
31	0
32	5
33	2
34	1
35	4
36	2
37	0
38	1
39	2
40	7
41	0
42	3
43	0
44	18
45	4
46	1
47	0
48	6
49	0
50	1
51	2
52	34
53	0
54	3
55	4
56	11
57	2
58	1
59	0
60	8
61	0
62	1
63	8
64	6
65	4
66	3
67	0
68	66
69	2
70	5
71	0
72	3
73	0
74	1
75	2
76	130
77	8
78	3
79	0
80	8
81	0
82	1
83	0
84	12
85	4
86	1
87	2
88	19
89	0
90	5
91	8
92	258
93	2
94	1
95	4
96	7
97	0
98	1
99	16
100	2
101	0
102	3
103	0
104	35
105	6