A246369 - cp's OEIS frontend

A246369 a(1)=0, a(p_n) = a(n), a(c_n) = 1 + a(n), where p_n = n-th prime = A000040(n), c_n = n-th composite number = A002808(n); Also one less than the binary weight of terms of A135141.

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	1
8	1
9	2
10	1
11	0
12	2
13	1
14	2
15	2
16	3
17	1
18	2
19	1
20	1
21	3
22	2
23	2
24	3
25	3
26	4
27	2
28	3
29	1
30	2
31	0
32	2
33	4
34	3
35	3
36	4
37	2
38	4
39	5
40	3
41	1
42	4
43	2
44	2
45	3
46	1
47	2
48	3
49	5
50	4
51	4
52	5
53	3
54	3
55	5
56	6
57	4
58	2
59	1
60	5
61	2
62	3
63	3
64	4
65	2
66	3
67	1
68	4
69	6
70	5
71	1
72	5
73	3
74	6
75	4
76	4
77	6
78	7
79	2
80	5
81	3
82	2
83	2
84	6
85	3
86	4
87	4
88	5
89	3
90	3
91	4
92	2
93	5
94	7
95	6
96	2
97	3
98	6
99	4
100	7
101	4
102	5
103	2
104	5
105	7
106	8
107	3
108	3
109	1
110	6
111	4
112	3
113	2
114	3
115	7
116	4
117	5
118	5
119	6
120	4

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

cp's OEIS Frontend

A246369 a(1)=0, a(p_n) = a(n), a(c_n) = 1 + a(n), where p_n = n-th prime = A000040(n), c_n = n-th composite number = A002808(n); Also one less than the binary weight of terms of A135141.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	1
8	1
9	2
10	1
11	0
12	2
13	1
14	2
15	2
16	3
17	1
18	2
19	1
20	1
21	3
22	2
23	2
24	3
25	3
26	4
27	2
28	3
29	1
30	2
31	0
32	2
33	4
34	3
35	3
36	4
37	2
38	4
39	5
40	3
41	1
42	4
43	2
44	2
45	3
46	1
47	2
48	3
49	5
50	4
51	4
52	5
53	3
54	3
55	5
56	6
57	4
58	2
59	1
60	5
61	2
62	3
63	3
64	4
65	2
66	3
67	1
68	4
69	6
70	5
71	1
72	5
73	3
74	6
75	4
76	4
77	6
78	7
79	2
80	5
81	3
82	2
83	2
84	6
85	3
86	4
87	4
88	5
89	3
90	3
91	4
92	2
93	5
94	7
95	6
96	2
97	3
98	6
99	4
100	7
101	4
102	5
103	2
104	5
105	7
106	8
107	3
108	3
109	1
110	6
111	4
112	3
113	2
114	3
115	7
116	4
117	5
118	5
119	6
120	4

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	1
8	1
9	2
10	1
11	0
12	2
13	1
14	2
15	2
16	3
17	1
18	2
19	1
20	1
21	3
22	2
23	2
24	3
25	3
26	4
27	2
28	3
29	1
30	2
31	0
32	2
33	4
34	3
35	3
36	4
37	2
38	4
39	5
40	3
41	1
42	4
43	2
44	2
45	3
46	1
47	2
48	3
49	5
50	4
51	4
52	5
53	3
54	3
55	5
56	6
57	4
58	2
59	1
60	5
61	2
62	3
63	3
64	4
65	2
66	3
67	1
68	4
69	6
70	5
71	1
72	5
73	3
74	6
75	4
76	4
77	6
78	7
79	2
80	5
81	3
82	2
83	2
84	6
85	3
86	4
87	4
88	5
89	3
90	3
91	4
92	2
93	5
94	7
95	6
96	2
97	3
98	6
99	4
100	7
101	4
102	5
103	2
104	5
105	7
106	8
107	3
108	3
109	1
110	6
111	4
112	3
113	2
114	3
115	7
116	4
117	5
118	5
119	6
120	4

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	1
8	1
9	2
10	1
11	0
12	2
13	1
14	2
15	2
16	3
17	1
18	2
19	1
20	1
21	3
22	2
23	2
24	3
25	3
26	4
27	2
28	3
29	1
30	2
31	0
32	2
33	4
34	3
35	3
36	4
37	2
38	4
39	5
40	3
41	1
42	4
43	2
44	2
45	3
46	1
47	2
48	3
49	5
50	4
51	4
52	5
53	3
54	3
55	5
56	6
57	4
58	2
59	1
60	5
61	2
62	3
63	3
64	4
65	2
66	3
67	1
68	4
69	6
70	5
71	1
72	5
73	3
74	6
75	4
76	4
77	6
78	7
79	2
80	5
81	3
82	2
83	2
84	6
85	3
86	4
87	4
88	5
89	3
90	3
91	4
92	2
93	5
94	7
95	6
96	2
97	3
98	6
99	4
100	7
101	4
102	5
103	2
104	5
105	7
106	8
107	3
108	3
109	1
110	6
111	4
112	3
113	2
114	3
115	7
116	4
117	5
118	5
119	6
120	4