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.

A193980 Mirror of the triangle A193979.

Table of values

n a(n)
0 1
1 3
2 2
3 9
4 5
5 3
6 21
7 13
8 7
9 4
10 41
11 28
12 17
13 9
14 5
15 71
16 52
17 35
18 21
19 11
20 6
21 113
22 87
23 63
24 42
25 25
26 13
27 7
28 169
29 135
30 103
31 74
32 49
33 29
34 15
35 8
36 241
37 198
38 157
39 119
40 85
41 56
42 33
43 17
44 9
45 331
46 278
47 227
48 179
49 135
50 96
51 63
52 37
53 19
54 10
55 441
56 377
57 315
58 256
59 201
60 151
61 107
62 70
63 41
64 21
65 11

List of values

[1, 3, 2, 9, 5, 3, 21, 13, 7, 4, 41, 28, 17, 9, 5, 71, 52, 35, 21, 11, 6, 113, 87, 63, 42, 25, 13, 7, 169, 135, 103, 74, 49, 29, 15, 8, 241, 198, 157, 119, 85, 56, 33, 17, 9, 331, 278, 227, 179, 135, 96, 63, 37, 19, 10, 441, 377, 315, 256, 201, 151, 107, 70, 41, 21, 11]