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.

A131327 Triangle |4*|A049310(n,k)| - 3| read by rows, 0<=k<=n.

Table of values

n a(n)
0 1
1 3
2 1
3 1
4 3
5 1
6 3
7 5
8 3
9 1
10 1
11 3
12 9
13 3
14 1
15 3
16 9
17 3
18 13
19 3
20 1
21 1
22 3
23 21
24 3
25 17
26 3
27 1
28 3
29 13
30 3
31 37
32 3
33 21
34 3
35 1
36 1
37 3
38 37
39 3
40 57
41 3
42 25
43 3
44 1
45 3
46 17
47 3
48 77
49 3
50 81
51 3
52 29
53 3
54 1
55 1
56 3
57 57
58 3
59 137
60 3
61 109
62 3
63 33
64 3
65 1
66 3
67 21
68 3
69 137
70 3
71 221
72 3
73 141
74 3
75 37
76 3
77 1
78 1
79 3
80 81
81 3
82 277
83 3
84 333
85 3
86 177

List of values

[1, 3, 1, 1, 3, 1, 3, 5, 3, 1, 1, 3, 9, 3, 1, 3, 9, 3, 13, 3, 1, 1, 3, 21, 3, 17, 3, 1, 3, 13, 3, 37, 3, 21, 3, 1, 1, 3, 37, 3, 57, 3, 25, 3, 1, 3, 17, 3, 77, 3, 81, 3, 29, 3, 1, 1, 3, 57, 3, 137, 3, 109, 3, 33, 3, 1, 3, 21, 3, 137, 3, 221, 3, 141, 3, 37, 3, 1, 1, 3, 81, 3, 277, 3, 333, 3, 177]