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.

A291969 Triangle read by rows: T(n,k) = k * (T(n-k,k-1) + T(n-k,k)) with T(0,0) = 1 for 0 <= k <= A003056(n).

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 1
5 0
6 1
7 2
8 0
9 1
10 2
11 0
12 1
13 6
14 0
15 1
16 6
17 6
18 0
19 1
20 14
21 6
22 0
23 1
24 14
25 18
26 0
27 1
28 30
29 36
30 0
31 1
32 30
33 60
34 24
35 0
36 1
37 62
38 96
39 24
40 0
41 1
42 62
43 198
44 72
45 0
46 1
47 126
48 270
49 144
50 0
51 1
52 126
53 474
54 336
55 0
56 1
57 254
58 780
59 480
60 120
61 0
62 1
63 254
64 1188
65 1080
66 120
67 0
68 1
69 510
70 1800

List of values

[1, 0, 1, 0, 1, 0, 1, 2, 0, 1, 2, 0, 1, 6, 0, 1, 6, 6, 0, 1, 14, 6, 0, 1, 14, 18, 0, 1, 30, 36, 0, 1, 30, 60, 24, 0, 1, 62, 96, 24, 0, 1, 62, 198, 72, 0, 1, 126, 270, 144, 0, 1, 126, 474, 336, 0, 1, 254, 780, 480, 120, 0, 1, 254, 1188, 1080, 120, 0, 1, 510, 1800]