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.

A256890 Triangle T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = x + 2.

Table of values

n a(n)
0 1
1 2
2 2
3 4
4 12
5 4
6 8
7 52
8 52
9 8
10 16
11 196
12 416
13 196
14 16
15 32
16 684
17 2644
18 2644
19 684
20 32
21 64
22 2276
23 14680
24 26440
25 14680
26 2276
27 64
28 128
29 7340
30 74652
31 220280
32 220280
33 74652
34 7340
35 128
36 256
37 23172
38 357328
39 1623964
40 2643360
41 1623964
42 357328
43 23172
44 256
45 512
46 72076
47 1637860
48 10978444
49 27227908
50 27227908
51 10978444
52 1637860
53 72076
54 512

List of values

[1, 2, 2, 4, 12, 4, 8, 52, 52, 8, 16, 196, 416, 196, 16, 32, 684, 2644, 2644, 684, 32, 64, 2276, 14680, 26440, 14680, 2276, 64, 128, 7340, 74652, 220280, 220280, 74652, 7340, 128, 256, 23172, 357328, 1623964, 2643360, 1623964, 357328, 23172, 256, 512, 72076, 1637860, 10978444, 27227908, 27227908, 10978444, 1637860, 72076, 512]