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.

A280785 Triangle read by rows: numbers of nonintersecting circles, one marked.

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 2
6 1
7 5
8 5
9 2
10 1
11 13
12 13
13 6
14 2
15 1
16 35
17 35
18 16
19 6
20 2
21 1
22 95
23 95
24 46
25 17
26 6
27 2
28 1
29 262
30 262
31 128
32 49
33 17
34 6
35 2
36 1
37 727
38 727
39 364
40 139
41 50
42 17
43 6
44 2
45 1
46 2033
47 2033
48 1029
49 401
50 142
51 50
52 17
53 6
54 2
55 1
56 5714
57 5714
58 2930
59 1147
60 412
61 143
62 50
63 17
64 6
65 2
66 1
67 16136
68 16136
69 8344
70 3299
71 1184
72 415
73 143
74 50
75 17
76 6
77 2
78 1

List of values

[1, 1, 1, 2, 2, 1, 5, 5, 2, 1, 13, 13, 6, 2, 1, 35, 35, 16, 6, 2, 1, 95, 95, 46, 17, 6, 2, 1, 262, 262, 128, 49, 17, 6, 2, 1, 727, 727, 364, 139, 50, 17, 6, 2, 1, 2033, 2033, 1029, 401, 142, 50, 17, 6, 2, 1, 5714, 5714, 2930, 1147, 412, 143, 50, 17, 6, 2, 1, 16136, 16136, 8344, 3299, 1184, 415, 143, 50, 17, 6, 2, 1]