A091304 - cp's OEIS frontend

A091304 a(n) = Omega(2n-1) (number of prime factors of the n-th odd number, counted with multiplicity).

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

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

cp's OEIS Frontend

A091304 a(n) = Omega(2n-1) (number of prime factors of the n-th odd number, counted with multiplicity).

Table of values

List of values

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

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

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