A023841 - cp's OEIS frontend

A023841 Sum of exponents in prime-power factorization of C(5n,n-4).

n	a(n)
4	0
5	2
6	3
7	4
8	5
9	6
10	9
11	9
12	9
13	10
14	11
15	10
16	12
17	13
18	15
19	13
20	15
21	16
22	15
23	15
24	16
25	17
26	21
27	22
28	22
29	22
30	24
31	19
32	21
33	22
34	23
35	23
36	23
37	23
38	24
39	25
40	25
41	25
42	28
43	24
44	26
45	31
46	29
47	27
48	29
49	30
50	33
51	33
52	36
53	35
54	36
55	36
56	37
57	36
58	39
59	37
60	38
61	37
62	37
63	34
64	36
65	40
66	42
67	38
68	36
69	39
70	40
71	40
72	42
73	42
74	41
75	43
76	43
77	47
78	48
79	45
80	46
81	47

[0, 2, 3, 4, 5, 6, 9, 9, 9, 10, 11, 10, 12, 13, 15, 13, 15, 16, 15, 15, 16, 17, 21, 22, 22, 22, 24, 19, 21, 22, 23, 23, 23, 23, 24, 25, 25, 25, 28, 24, 26, 31, 29, 27, 29, 30, 33, 33, 36, 35, 36, 36, 37, 36, 39, 37, 38, 37, 37, 34, 36, 40, 42, 38, 36, 39, 40, 40, 42, 42, 41, 43, 43, 47, 48, 45, 46, 47]

cp's OEIS Frontend

A023841 Sum of exponents in prime-power factorization of C(5n,n-4).

Table of values

List of values

n	a(n)
4	0
5	2
6	3
7	4
8	5
9	6
10	9
11	9
12	9
13	10
14	11
15	10
16	12
17	13
18	15
19	13
20	15
21	16
22	15
23	15
24	16
25	17
26	21
27	22
28	22
29	22
30	24
31	19
32	21
33	22
34	23
35	23
36	23
37	23
38	24
39	25
40	25
41	25
42	28
43	24
44	26
45	31
46	29
47	27
48	29
49	30
50	33
51	33
52	36
53	35
54	36
55	36
56	37
57	36
58	39
59	37
60	38
61	37
62	37
63	34
64	36
65	40
66	42
67	38
68	36
69	39
70	40
71	40
72	42
73	42
74	41
75	43
76	43
77	47
78	48
79	45
80	46
81	47

n	a(n)
4	0
5	2
6	3
7	4
8	5
9	6
10	9
11	9
12	9
13	10
14	11
15	10
16	12
17	13
18	15
19	13
20	15
21	16
22	15
23	15
24	16
25	17
26	21
27	22
28	22
29	22
30	24
31	19
32	21
33	22
34	23
35	23
36	23
37	23
38	24
39	25
40	25
41	25
42	28
43	24
44	26
45	31
46	29
47	27
48	29
49	30
50	33
51	33
52	36
53	35
54	36
55	36
56	37
57	36
58	39
59	37
60	38
61	37
62	37
63	34
64	36
65	40
66	42
67	38
68	36
69	39
70	40
71	40
72	42
73	42
74	41
75	43
76	43
77	47
78	48
79	45
80	46
81	47

n	a(n)
4	0
5	2
6	3
7	4
8	5
9	6
10	9
11	9
12	9
13	10
14	11
15	10
16	12
17	13
18	15
19	13
20	15
21	16
22	15
23	15
24	16
25	17
26	21
27	22
28	22
29	22
30	24
31	19
32	21
33	22
34	23
35	23
36	23
37	23
38	24
39	25
40	25
41	25
42	28
43	24
44	26
45	31
46	29
47	27
48	29
49	30
50	33
51	33
52	36
53	35
54	36
55	36
56	37
57	36
58	39
59	37
60	38
61	37
62	37
63	34
64	36
65	40
66	42
67	38
68	36
69	39
70	40
71	40
72	42
73	42
74	41
75	43
76	43
77	47
78	48
79	45
80	46
81	47