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.

A114422 Riordan array (1/sqrt(1-2*x-3*x^2), M(x)-1) where M(x) is the g.f. of the Motzkin numbers A001006.

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 3
5 1
6 7
7 9
8 5
9 1
10 19
11 26
12 19
13 7
14 1
15 51
16 75
17 65
18 33
19 9
20 1
21 141
22 216
23 211
24 132
25 51
26 11
27 1
28 393
29 623
30 665
31 483
32 235
33 73
34 13
35 1
36 1107
37 1800
38 2058
39 1674
40 963
41 382
42 99
43 15
44 1
45 3139
46 5211
47 6294
48 5598
49 3663
50 1739
51 581
52 129
53 17
54 1
55 8953
56 15115
57 19095
58 18261
59 13243

List of values

[1, 1, 1, 3, 3, 1, 7, 9, 5, 1, 19, 26, 19, 7, 1, 51, 75, 65, 33, 9, 1, 141, 216, 211, 132, 51, 11, 1, 393, 623, 665, 483, 235, 73, 13, 1, 1107, 1800, 2058, 1674, 963, 382, 99, 15, 1, 3139, 5211, 6294, 5598, 3663, 1739, 581, 129, 17, 1, 8953, 15115, 19095, 18261, 13243]