A023508 - cp's OEIS frontend

A023508 Sum of exponents in prime-power factorization of n-th prime - 1.

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

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

cp's OEIS Frontend

A023508 Sum of exponents in prime-power factorization of n-th prime - 1.

Table of values

List of values

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

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

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