A080087 - cp's OEIS frontend

A080087 Number of factors of 5 in the factorial of the n-th prime, counted with multiplicity.

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	2
7	3
8	3
9	4
10	6
11	7
12	8
13	9
14	9
15	10
16	12
17	13
18	14
19	15
20	16
21	16
22	18
23	19
24	20
25	22
26	24
27	24
28	25
29	25
30	26
31	31
32	32
33	33
34	33
35	35
36	37
37	38
38	39
39	40
40	41
41	43
42	44
43	46
44	46
45	47
46	47
47	51
48	53
49	55
50	55
51	56
52	57
53	58
54	62
55	63
56	64
57	65
58	66
59	68
60	69
61	69
62	71
63	75
64	76
65	76
66	77
67	81
68	82
69	84
70	84
71	86
72	87
73	89
74	90

[0, 0, 1, 1, 2, 2, 3, 3, 4, 6, 7, 8, 9, 9, 10, 12, 13, 14, 15, 16, 16, 18, 19, 20, 22, 24, 24, 25, 25, 26, 31, 32, 33, 33, 35, 37, 38, 39, 40, 41, 43, 44, 46, 46, 47, 47, 51, 53, 55, 55, 56, 57, 58, 62, 63, 64, 65, 66, 68, 69, 69, 71, 75, 76, 76, 77, 81, 82, 84, 84, 86, 87, 89, 90]

cp's OEIS Frontend

A080087 Number of factors of 5 in the factorial of the n-th prime, counted with multiplicity.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	2
7	3
8	3
9	4
10	6
11	7
12	8
13	9
14	9
15	10
16	12
17	13
18	14
19	15
20	16
21	16
22	18
23	19
24	20
25	22
26	24
27	24
28	25
29	25
30	26
31	31
32	32
33	33
34	33
35	35
36	37
37	38
38	39
39	40
40	41
41	43
42	44
43	46
44	46
45	47
46	47
47	51
48	53
49	55
50	55
51	56
52	57
53	58
54	62
55	63
56	64
57	65
58	66
59	68
60	69
61	69
62	71
63	75
64	76
65	76
66	77
67	81
68	82
69	84
70	84
71	86
72	87
73	89
74	90

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	2
7	3
8	3
9	4
10	6
11	7
12	8
13	9
14	9
15	10
16	12
17	13
18	14
19	15
20	16
21	16
22	18
23	19
24	20
25	22
26	24
27	24
28	25
29	25
30	26
31	31
32	32
33	33
34	33
35	35
36	37
37	38
38	39
39	40
40	41
41	43
42	44
43	46
44	46
45	47
46	47
47	51
48	53
49	55
50	55
51	56
52	57
53	58
54	62
55	63
56	64
57	65
58	66
59	68
60	69
61	69
62	71
63	75
64	76
65	76
66	77
67	81
68	82
69	84
70	84
71	86
72	87
73	89
74	90

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	2
7	3
8	3
9	4
10	6
11	7
12	8
13	9
14	9
15	10
16	12
17	13
18	14
19	15
20	16
21	16
22	18
23	19
24	20
25	22
26	24
27	24
28	25
29	25
30	26
31	31
32	32
33	33
34	33
35	35
36	37
37	38
38	39
39	40
40	41
41	43
42	44
43	46
44	46
45	47
46	47
47	51
48	53
49	55
50	55
51	56
52	57
53	58
54	62
55	63
56	64
57	65
58	66
59	68
60	69
61	69
62	71
63	75
64	76
65	76
66	77
67	81
68	82
69	84
70	84
71	86
72	87
73	89
74	90