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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.

A382217 a(n) is the least k > 0 such that the factorial base expansion of n starts with that of k.

Table of values

n a(n)
1 1
2 1
3 1
4 4
5 5
6 1
7 1
8 1
9 1
10 1
11 1
12 4
13 4
14 5
15 5
16 16
17 17
18 18
19 19
20 20
21 21
22 22
23 23
24 1
25 1
26 1
27 1
28 1
29 1
30 1
31 1
32 1
33 1
34 1
35 1
36 1
37 1
38 1
39 1
40 1
41 1
42 1
43 1
44 1
45 1
46 1
47 1
48 4
49 4
50 4
51 4
52 4
53 4
54 5
55 5
56 5
57 5
58 5
59 5
60 16
61 16
62 17
63 17
64 64
65 65
66 66
67 67
68 68
69 69
70 70
71 71
72 18
73 18
74 19
75 19
76 76
77 77
78 20

List of values

[1, 1, 1, 4, 5, 1, 1, 1, 1, 1, 1, 4, 4, 5, 5, 16, 17, 18, 19, 20, 21, 22, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 16, 16, 17, 17, 64, 65, 66, 67, 68, 69, 70, 71, 18, 18, 19, 19, 76, 77, 20]