A367008 - cp's OEIS frontend

A367008 Number of prime factors of n*2^n + 1, counted with multiplicity.

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

[0, 1, 2, 2, 2, 2, 3, 3, 2, 2, 4, 2, 3, 3, 3, 3, 2, 4, 4, 4, 5, 2, 4, 4, 4, 4, 5, 4, 3, 3, 6, 6, 3, 2, 5, 2, 4, 3, 4, 3, 3, 4, 4, 5, 4, 4, 5, 5, 4, 5, 6, 3, 6, 3, 5, 4, 4, 5, 5, 4, 4, 7, 3, 3, 7, 5, 9, 5, 4, 5, 5, 6, 5, 5, 5, 5, 5, 4, 4, 6, 4, 4, 4, 5, 4, 7, 6]

cp's OEIS Frontend

A367008 Number of prime factors of n*2^n + 1, counted with multiplicity.

Table of values

List of values

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

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

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