A181578 - cp's OEIS frontend

A181578 The number k such that each of the five factorials (5k+j)!, j=0..4, has exactly n trailing zeros in its base-10 representation; 0 if no such k exists.

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

[0, 1, 2, 3, 4, 0, 5, 6, 7, 8, 9, 0, 10, 11, 12, 13, 14, 0, 15, 16, 17, 18, 19, 0, 20, 21, 22, 23, 24, 0, 0, 25, 26, 27, 28, 29, 0, 30, 31, 32, 33, 34, 0, 35, 36, 37, 38, 39, 0, 40, 41, 42, 43, 44, 0, 45, 46, 47, 48, 49, 0, 0, 50, 51, 52, 53, 54, 0, 55, 56, 57, 58, 59, 0, 60, 61, 62, 63]

cp's OEIS Frontend

A181578 The number k such that each of the five factorials (5k+j)!, j=0..4, has exactly n trailing zeros in its base-10 representation; 0 if no such k exists.

Table of values

List of values

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

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

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