A023840 - cp's OEIS frontend

A023840 Sum of exponents in prime-power factorization of C(5n,n-3).

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

[0, 3, 5, 5, 7, 8, 8, 11, 11, 10, 12, 14, 13, 14, 16, 16, 14, 18, 17, 17, 18, 18, 19, 25, 23, 23, 25, 24, 23, 24, 23, 26, 24, 24, 25, 26, 27, 27, 28, 29, 25, 30, 32, 31, 31, 30, 33, 36, 33, 37, 38, 38, 39, 40, 36, 40, 39, 39, 39, 41, 38, 39, 43, 42, 37, 38, 41, 42, 44, 43, 43, 45, 43, 46, 50, 48, 49]

cp's OEIS Frontend

A023840 Sum of exponents in prime-power factorization of C(5n,n-3).

Table of values

List of values

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

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

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