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.

A101350 Triangle read by rows: T(n,k) = number of k-matchings in the graph obtained by a zig-zag triangulation of a convex n-gon, T(0,0)=T(1,0)=T(2,0)=T(2,1)=1 (n > 2, 0 <= k <= floor(n/2)).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 3
6 1
7 5
8 2
9 1
10 7
11 7
12 1
13 9
14 16
15 3
16 1
17 11
18 29
19 15
20 1
21 13
22 46
23 43
24 5
25 1
26 15
27 67
28 95
29 30
30 1
31 17
32 92
33 179
34 104
35 8
36 1
37 19
38 121
39 303
40 271
41 58
42 1
43 21
44 154
45 475
46 591
47 235
48 13
49 1
50 23
51 191
52 703
53 1140
54 705
55 109
56 1
57 25
58 232
59 995
60 2010
61 1746
62 506
63 21
64 1
65 27
66 277
67 1359
68 3309
69 3780

List of values

[1, 1, 1, 1, 1, 3, 1, 5, 2, 1, 7, 7, 1, 9, 16, 3, 1, 11, 29, 15, 1, 13, 46, 43, 5, 1, 15, 67, 95, 30, 1, 17, 92, 179, 104, 8, 1, 19, 121, 303, 271, 58, 1, 21, 154, 475, 591, 235, 13, 1, 23, 191, 703, 1140, 705, 109, 1, 25, 232, 995, 2010, 1746, 506, 21, 1, 27, 277, 1359, 3309, 3780]