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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.

A046566 First denominator and then numerator of the 1/4-Pascal triangle (by row), excluding 1's.

Table of values

n a(n)
1 4
2 4
3 5
4 4
5 5
6 4
7 9
8 2
9 5
10 4
11 9
12 4
13 13
14 4
15 19
16 4
17 19
18 4
19 13
20 4
21 17
22 8
23 2
24 19
25 8
26 4
27 17
28 4
29 21
30 4
31 49
32 2
33 35
34 2
35 35
36 4
37 49
38 4
39 21
40 4
41 25
42 2
43 35
44 4
45 119
46 35
47 4
48 119
49 2
50 35
51 4
52 25
53 4
54 29
55 4
56 95
57 4
58 189
59 4
60 259
61 4
62 259
63 4
64 189
65 4
66 95
67 4
68 29
69 4
70 33
71 31
72 71
73 112
74 2

List of values

[4, 4, 5, 4, 5, 4, 9, 2, 5, 4, 9, 4, 13, 4, 19, 4, 19, 4, 13, 4, 17, 8, 2, 19, 8, 4, 17, 4, 21, 4, 49, 2, 35, 2, 35, 4, 49, 4, 21, 4, 25, 2, 35, 4, 119, 35, 4, 119, 2, 35, 4, 25, 4, 29, 4, 95, 4, 189, 4, 259, 4, 259, 4, 189, 4, 95, 4, 29, 4, 33, 31, 71, 112, 2]

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