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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.

A256113 Table read by rows: T(1,1) = 1, for n > 1: row n = union of distinct prime factors occurring in terms of n-th row of Pascal's triangle, cf. A007318.

Table of values

n a(n)
1 1
2 2
3 3
4 2
5 3
6 2
7 5
8 2
9 3
10 5
11 3
12 5
13 7
14 2
15 5
16 7
17 2
18 3
19 7
20 2
21 3
22 5
23 7
24 2
25 3
26 5
27 7
28 11
29 2
30 3
31 5
32 7
33 11
34 2
35 3
36 5
37 11
38 13
39 2
40 3
41 7
42 11
43 13
44 3
45 5
46 7
47 11
48 13
49 2
50 3
51 5
52 7
53 11
54 13
55 2
56 5
57 7
58 11
59 13
60 17
61 2
62 3
63 5
64 7
65 11
66 13
67 17
68 2
69 3
70 7
71 11
72 13
73 17
74 19
75 2
76 3
77 5
78 11
79 13

List of values

[1, 2, 3, 2, 3, 2, 5, 2, 3, 5, 3, 5, 7, 2, 5, 7, 2, 3, 7, 2, 3, 5, 7, 2, 3, 5, 7, 11, 2, 3, 5, 7, 11, 2, 3, 5, 11, 13, 2, 3, 7, 11, 13, 3, 5, 7, 11, 13, 2, 3, 5, 7, 11, 13, 2, 5, 7, 11, 13, 17, 2, 3, 5, 7, 11, 13, 17, 2, 3, 7, 11, 13, 17, 19, 2, 3, 5, 11, 13]

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