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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.

A098473 Triangle T(n,k) read by rows, T(n, k) = binomial(2*k, k)*binomial(n, k), 0<=k<=n.

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 4
5 6
6 1
7 6
8 18
9 20
10 1
11 8
12 36
13 80
14 70
15 1
16 10
17 60
18 200
19 350
20 252
21 1
22 12
23 90
24 400
25 1050
26 1512
27 924
28 1
29 14
30 126
31 700
32 2450
33 5292
34 6468
35 3432
36 1
37 16
38 168
39 1120
40 4900
41 14112
42 25872
43 27456
44 12870
45 1
46 18
47 216
48 1680
49 8820
50 31752
51 77616
52 123552
53 115830

List of values

[1, 1, 2, 1, 4, 6, 1, 6, 18, 20, 1, 8, 36, 80, 70, 1, 10, 60, 200, 350, 252, 1, 12, 90, 400, 1050, 1512, 924, 1, 14, 126, 700, 2450, 5292, 6468, 3432, 1, 16, 168, 1120, 4900, 14112, 25872, 27456, 12870, 1, 18, 216, 1680, 8820, 31752, 77616, 123552, 115830]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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