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.

A126454 Triangle, read by rows, where T(n,k) = C( C(n+2,3) - C(k+2,3) + 2, n-k) for n>=k>=0.

Table of values

n a(n)
0 1
1 3
2 1
3 15
4 5
5 1
6 220
7 55
8 8
9 1
10 7315
11 1330
12 153
13 12
14 1
15 435897
16 58905
17 5456
18 351
19 17
20 1
21 40475358
22 4187106
23 316251
24 17296
25 703
26 23
27 1
28 5373200880
29 437353560
30 27285336
31 1282975
32 45760
33 1275
34 30
35 1
36 962889794295
37 63140314380
38 3295144749
39 134153712

List of values

[1, 3, 1, 15, 5, 1, 220, 55, 8, 1, 7315, 1330, 153, 12, 1, 435897, 58905, 5456, 351, 17, 1, 40475358, 4187106, 316251, 17296, 703, 23, 1, 5373200880, 437353560, 27285336, 1282975, 45760, 1275, 30, 1, 962889794295, 63140314380, 3295144749, 134153712]