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.

A122178 Triangle, read by rows, where T(n,k) = C( n*(n+1)/2 + n-k - 1, n-k), for n>=k>=0.

Table of values

n a(n)
0 1
1 1
2 1
3 6
4 3
5 1
6 56
7 21
8 6
9 1
10 715
11 220
12 55
13 10
14 1
15 11628
16 3060
17 680
18 120
19 15
20 1
21 230230
22 53130
23 10626
24 1771
25 231
26 21
27 1
28 5379616
29 1107568
30 201376
31 31465
32 4060
33 406
34 28
35 1
36 145008513
37 26978328
38 4496388
39 658008
40 82251
41 8436
42 666
43 36
44 1
45 4431613550

List of values

[1, 1, 1, 6, 3, 1, 56, 21, 6, 1, 715, 220, 55, 10, 1, 11628, 3060, 680, 120, 15, 1, 230230, 53130, 10626, 1771, 231, 21, 1, 5379616, 1107568, 201376, 31465, 4060, 406, 28, 1, 145008513, 26978328, 4496388, 658008, 82251, 8436, 666, 36, 1, 4431613550]