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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A356860 a(n) is the number of digits in the product of the first n numbers not divisible by 5.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 3
6 4
7 4
8 5
9 6
10 7
11 9
12 10
13 11
14 12
15 13
16 15
17 16
18 17
19 19
20 20
21 22
22 23
23 24
24 26
25 27
26 29
27 30
28 32
29 33
30 35
31 37
32 38
33 40
34 41
35 43
36 45
37 46
38 48
39 50
40 51
41 53
42 55
43 57
44 58
45 60
46 62
47 64
48 65
49 67
50 69
51 71
52 73
53 74
54 76
55 78
56 80
57 82
58 84
59 85
60 87
61 89
62 91
63 93
64 95
65 97
66 99
67 101
68 103

List of values

[1, 1, 1, 1, 2, 3, 4, 4, 5, 6, 7, 9, 10, 11, 12, 13, 15, 16, 17, 19, 20, 22, 23, 24, 26, 27, 29, 30, 32, 33, 35, 37, 38, 40, 41, 43, 45, 46, 48, 50, 51, 53, 55, 57, 58, 60, 62, 64, 65, 67, 69, 71, 73, 74, 76, 78, 80, 82, 84, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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