A126805 - cp's OEIS frontend

A126805 "Class-" (or "class-minus") number of prime(n) according to the Erdős-Selfridge classification of primes.

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

[1, 1, 1, 1, 2, 1, 1, 1, 3, 2, 2, 1, 2, 2, 4, 2, 3, 2, 3, 2, 1, 2, 3, 3, 1, 2, 2, 3, 1, 2, 2, 2, 2, 4, 2, 2, 2, 1, 4, 3, 4, 2, 2, 1, 2, 3, 2, 2, 3, 2, 3, 2, 2, 2, 1, 3, 4, 2, 4, 2, 5, 2, 2, 3, 2, 3, 3, 2, 4, 3, 3, 5, 3, 3, 2, 3, 2, 3, 2, 2, 3, 2, 3, 1, 2, 2, 2, 2, 4, 3, 4, 3, 1, 2, 4, 3, 3, 2, 3, 2, 2, 5, 3, 3, 2]

cp's OEIS Frontend

A126805 "Class-" (or "class-minus") number of prime(n) according to the Erdős-Selfridge classification of primes.

Table of values

List of values

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

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

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