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.

A128899 Riordan array (1,(1-2x-sqrt(1-4x))/(2x)).

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 2
5 1
6 0
7 5
8 4
9 1
10 0
11 14
12 14
13 6
14 1
15 0
16 42
17 48
18 27
19 8
20 1
21 0
22 132
23 165
24 110
25 44
26 10
27 1
28 0
29 429
30 572
31 429
32 208
33 65
34 12
35 1
36 0
37 1430
38 2002
39 1638
40 910
41 350
42 90
43 14
44 1
45 0
46 4862
47 7072
48 6188
49 3808
50 1700
51 544
52 119
53 16
54 1
55 0
56 16796
57 25194
58 23256
59 15504
60 7752
61 2907
62 798
63 152
64 18
65 1

List of values

[1, 0, 1, 0, 2, 1, 0, 5, 4, 1, 0, 14, 14, 6, 1, 0, 42, 48, 27, 8, 1, 0, 132, 165, 110, 44, 10, 1, 0, 429, 572, 429, 208, 65, 12, 1, 0, 1430, 2002, 1638, 910, 350, 90, 14, 1, 0, 4862, 7072, 6188, 3808, 1700, 544, 119, 16, 1, 0, 16796, 25194, 23256, 15504, 7752, 2907, 798, 152, 18, 1]