A023835 - cp's OEIS frontend

A023835 Sum of exponents in prime-power factorization of C(4n,2n-1).

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

[2, 4, 6, 7, 7, 9, 11, 12, 13, 13, 13, 15, 14, 16, 17, 18, 16, 18, 18, 20, 22, 22, 23, 25, 24, 24, 25, 24, 24, 28, 27, 29, 27, 30, 30, 32, 31, 31, 34, 32, 31, 33, 34, 37, 36, 35, 36, 40, 37, 37, 38, 39, 39, 42, 41, 42, 42, 42, 42, 43, 44, 46, 47, 48, 45, 46, 44, 45, 48, 49, 47, 50, 47, 49, 53, 52, 51]

cp's OEIS Frontend

A023835 Sum of exponents in prime-power factorization of C(4n,2n-1).

Table of values

List of values

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

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

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