A067434 - cp's OEIS frontend

A067434 Number of distinct prime factors in binomial(2*n,n).

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

[1, 2, 2, 3, 3, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 8, 8, 9, 9, 10, 10, 10, 9, 10, 10, 10, 10, 12, 13, 12, 12, 13, 14, 14, 14, 14, 14, 15, 14, 15, 15, 16, 16, 16, 17, 17, 17, 18, 18, 18, 18, 18, 19, 20, 19, 19, 19, 20, 20, 21, 21, 21, 21, 22, 22, 23, 24, 23, 23, 23, 23, 24, 24, 24, 25, 25]

cp's OEIS Frontend

A067434 Number of distinct prime factors in binomial(2*n,n).

Table of values

List of values

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

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

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