A054988 - cp's OEIS frontend

A054988 Number of prime divisors of 1 + (product of first n primes), with multiplicity.

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

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

cp's OEIS Frontend

A054988 Number of prime divisors of 1 + (product of first n primes), with multiplicity.

Table of values

List of values

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

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

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