A023816 - cp's OEIS frontend

A023816 Sum of exponents in prime-power factorization of C(2n,n).

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

[0, 1, 2, 3, 3, 5, 5, 6, 6, 6, 6, 8, 7, 9, 11, 11, 9, 11, 11, 12, 12, 12, 12, 15, 13, 14, 15, 14, 14, 16, 15, 16, 15, 16, 16, 17, 15, 16, 18, 19, 17, 21, 20, 22, 22, 21, 22, 24, 22, 22, 23, 23, 22, 25, 23, 23, 22, 22, 23, 26, 25, 27, 28, 29, 25, 26, 25, 27, 29, 29, 28, 30, 28, 30, 32, 31, 30, 32, 32, 33]

cp's OEIS Frontend

A023816 Sum of exponents in prime-power factorization of C(2n,n).

Table of values

List of values

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

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

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