A023506 - cp's OEIS frontend

A023506 Exponent of 2 in prime factorization of prime(n) - 1.

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

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

cp's OEIS Frontend

A023506 Exponent of 2 in prime factorization of prime(n) - 1.

Table of values

List of values

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

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

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