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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.

A171698 Square 'central binomial coefficients'-array read by antidiagonals.

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 2
6 2
7 6
8 6
9 4
10 4
11 20
12 20
13 14
14 8
15 8
16 70
17 70
18 50
19 30
20 16
21 16
22 252
23 252
24 182
25 112
26 62
27 32
28 32
29 924
30 924
31 672
32 420
33 238
34 126
35 64
36 64

List of values

[1, 1, 1, 2, 2, 2, 6, 6, 4, 4, 20, 20, 14, 8, 8, 70, 70, 50, 30, 16, 16, 252, 252, 182, 112, 62, 32, 32, 924, 924, 672, 420, 238, 126, 64, 64]