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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.

A358993 a(n) is the number of nonzero digits in the product of the first n odd numbers not divisible by 5.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 3
5 3
6 4
7 6
8 7
9 9
10 10
11 12
12 12
13 13
14 15
15 18
16 17
17 20
18 21
19 22
20 24
21 25
22 27
23 29
24 31
25 32
26 34
27 34
28 35
29 40
30 40
31 45
32 45
33 45
34 46
35 47
36 46
37 52
38 55
39 55
40 59
41 58
42 60
43 59
44 66
45 66
46 65
47 69
48 70
49 74
50 80
51 79
52 84
53 75
54 83
55 90
56 89
57 87
58 92
59 95
60 91
61 95
62 104
63 98
64 102
65 110
66 107

List of values

[1, 1, 1, 2, 3, 3, 4, 6, 7, 9, 10, 12, 12, 13, 15, 18, 17, 20, 21, 22, 24, 25, 27, 29, 31, 32, 34, 34, 35, 40, 40, 45, 45, 45, 46, 47, 46, 52, 55, 55, 59, 58, 60, 59, 66, 66, 65, 69, 70, 74, 80, 79, 84, 75, 83, 90, 89, 87, 92, 95, 91, 95, 104, 98, 102, 110, 107]

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

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