cp's OEIS Frontend

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.

A381883 Triangle read by rows: T(n, k) = binomial(2*n - 1, k).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 3
5 3
6 1
7 5
8 10
9 10
10 1
11 7
12 21
13 35
14 35
15 1
16 9
17 36
18 84
19 126
20 126
21 1
22 11
23 55
24 165
25 330
26 462
27 462
28 1
29 13
30 78
31 286
32 715
33 1287
34 1716
35 1716
36 1
37 15
38 105
39 455
40 1365
41 3003
42 5005
43 6435
44 6435
45 1
46 17
47 136
48 680
49 2380
50 6188
51 12376
52 19448
53 24310
54 24310

List of values

[1, 1, 1, 1, 3, 3, 1, 5, 10, 10, 1, 7, 21, 35, 35, 1, 9, 36, 84, 126, 126, 1, 11, 55, 165, 330, 462, 462, 1, 13, 78, 286, 715, 1287, 1716, 1716, 1, 15, 105, 455, 1365, 3003, 5005, 6435, 6435, 1, 17, 136, 680, 2380, 6188, 12376, 19448, 24310, 24310]