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.

A122890 Triangle, read by rows, where the g.f. of row n divided by (1-x)^n yields the g.f. of column n in the triangle A122888, for n>=1.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 0
5 2
6 0
7 0
8 1
9 5
10 0
11 0
12 0
13 10
14 14
15 0
16 0
17 0
18 8
19 70
20 42
21 0
22 0
23 0
24 4
25 160
26 424
27 132
28 0
29 0
30 0
31 1
32 250
33 1978
34 2382
35 429
36 0
37 0
38 0
39 0
40 302
41 6276
42 19508
43 12804
44 1430
45 0
46 0
47 0
48 0
49 298
50 15674
51 106492
52 168608
53 66946
54 4862
55 0
56 0
57 0
58 0
59 244
60 33148
61 451948
62 1445208
63 1337684
64 343772
65 16796

List of values

[1, 0, 1, 0, 0, 2, 0, 0, 1, 5, 0, 0, 0, 10, 14, 0, 0, 0, 8, 70, 42, 0, 0, 0, 4, 160, 424, 132, 0, 0, 0, 1, 250, 1978, 2382, 429, 0, 0, 0, 0, 302, 6276, 19508, 12804, 1430, 0, 0, 0, 0, 298, 15674, 106492, 168608, 66946, 4862, 0, 0, 0, 0, 244, 33148, 451948, 1445208, 1337684, 343772, 16796]