A008906 - cp's OEIS frontend

A008906 Number of digits in n! excluding final zeros.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	3
8	4
9	5
10	5
11	6
12	7
13	8
14	9
15	10
16	11
17	12
18	13
19	15
20	15
21	16
22	18
23	19
24	20
25	20
26	21
27	23
28	24
29	25
30	26
31	27
32	29
33	30
34	32
35	33
36	34
37	36
38	37
39	39
40	39
41	41
42	43
43	44
44	46
45	47
46	48
47	50
48	52
49	53
50	53
51	55
52	56
53	58
54	60
55	61
56	62
57	64
58	66
59	68
60	68
61	70
62	72
63	74
64	76
65	76
66	78
67	80
68	82
69	84
70	85
71	86
72	88
73	90
74	92
75	92
76	94

[1, 1, 1, 1, 2, 2, 2, 3, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 15, 16, 18, 19, 20, 20, 21, 23, 24, 25, 26, 27, 29, 30, 32, 33, 34, 36, 37, 39, 39, 41, 43, 44, 46, 47, 48, 50, 52, 53, 53, 55, 56, 58, 60, 61, 62, 64, 66, 68, 68, 70, 72, 74, 76, 76, 78, 80, 82, 84, 85, 86, 88, 90, 92, 92, 94]

cp's OEIS Frontend

A008906 Number of digits in n! excluding final zeros.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	3
8	4
9	5
10	5
11	6
12	7
13	8
14	9
15	10
16	11
17	12
18	13
19	15
20	15
21	16
22	18
23	19
24	20
25	20
26	21
27	23
28	24
29	25
30	26
31	27
32	29
33	30
34	32
35	33
36	34
37	36
38	37
39	39
40	39
41	41
42	43
43	44
44	46
45	47
46	48
47	50
48	52
49	53
50	53
51	55
52	56
53	58
54	60
55	61
56	62
57	64
58	66
59	68
60	68
61	70
62	72
63	74
64	76
65	76
66	78
67	80
68	82
69	84
70	85
71	86
72	88
73	90
74	92
75	92
76	94

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	3
8	4
9	5
10	5
11	6
12	7
13	8
14	9
15	10
16	11
17	12
18	13
19	15
20	15
21	16
22	18
23	19
24	20
25	20
26	21
27	23
28	24
29	25
30	26
31	27
32	29
33	30
34	32
35	33
36	34
37	36
38	37
39	39
40	39
41	41
42	43
43	44
44	46
45	47
46	48
47	50
48	52
49	53
50	53
51	55
52	56
53	58
54	60
55	61
56	62
57	64
58	66
59	68
60	68
61	70
62	72
63	74
64	76
65	76
66	78
67	80
68	82
69	84
70	85
71	86
72	88
73	90
74	92
75	92
76	94

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	3
8	4
9	5
10	5
11	6
12	7
13	8
14	9
15	10
16	11
17	12
18	13
19	15
20	15
21	16
22	18
23	19
24	20
25	20
26	21
27	23
28	24
29	25
30	26
31	27
32	29
33	30
34	32
35	33
36	34
37	36
38	37
39	39
40	39
41	41
42	43
43	44
44	46
45	47
46	48
47	50
48	52
49	53
50	53
51	55
52	56
53	58
54	60
55	61
56	62
57	64
58	66
59	68
60	68
61	70
62	72
63	74
64	76
65	76
66	78
67	80
68	82
69	84
70	85
71	86
72	88
73	90
74	92
75	92
76	94