A067437 - cp's OEIS frontend

A067437 Number of distinct prime factors in binomial(2*n,n)+1.

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

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

cp's OEIS Frontend

A067437 Number of distinct prime factors in binomial(2*n,n)+1.

Table of values

List of values

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

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

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