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.

A275328 Triangle read by rows, Riordan array [1, (1+x/(1-4*x^2))/sqrt(1-4*x^2)].

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 2
5 1
6 0
7 6
8 4
9 1
10 0
11 6
12 16
13 6
14 1
15 0
16 30
17 36
18 30
19 8
20 1
21 0
22 20
23 120
24 98
25 48
26 10
27 1
28 0
29 140
30 232
31 342
32 200
33 70
34 12
35 1
36 0
37 70
38 756
39 924
40 784
41 350
42 96
43 14
44 1
45 0
46 630
47 1300
48 2856
49 2576
50 1550
51 556
52 126
53 16
54 1

List of values

[1, 0, 1, 0, 2, 1, 0, 6, 4, 1, 0, 6, 16, 6, 1, 0, 30, 36, 30, 8, 1, 0, 20, 120, 98, 48, 10, 1, 0, 140, 232, 342, 200, 70, 12, 1, 0, 70, 756, 924, 784, 350, 96, 14, 1, 0, 630, 1300, 2856, 2576, 1550, 556, 126, 16, 1]