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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.

A132046 Triangle read by rows: T(n,0) = T(n,n) = 1, and T(n,k) = 2*binomial(n,k) for 1 <= k <= n - 1.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 4
5 1
6 1
7 6
8 6
9 1
10 1
11 8
12 12
13 8
14 1
15 1
16 10
17 20
18 20
19 10
20 1
21 1
22 12
23 30
24 40
25 30
26 12
27 1
28 1
29 14
30 42
31 70
32 70
33 42
34 14
35 1
36 1
37 16
38 56
39 112
40 140
41 112
42 56
43 16
44 1
45 1
46 18
47 72
48 168
49 252
50 252
51 168
52 72
53 18
54 1
55 1
56 20
57 90
58 240
59 420
60 504
61 420
62 240
63 90
64 20
65 1

List of values

[1, 1, 1, 1, 4, 1, 1, 6, 6, 1, 1, 8, 12, 8, 1, 1, 10, 20, 20, 10, 1, 1, 12, 30, 40, 30, 12, 1, 1, 14, 42, 70, 70, 42, 14, 1, 1, 16, 56, 112, 140, 112, 56, 16, 1, 1, 18, 72, 168, 252, 252, 168, 72, 18, 1, 1, 20, 90, 240, 420, 504, 420, 240, 90, 20, 1]

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