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.

A218869 Triangle read by rows: T(n,k) = number of aperiodic binary sequences of length n with curling number k (1 <= k <= n).

Table of values

n a(n)
1 2
2 2
3 0
4 4
5 2
6 0
7 6
8 4
9 2
10 0
11 12
12 12
13 4
14 2
15 0
16 20
17 20
18 8
19 4
20 2
21 0
22 40
23 52
24 20
25 8
26 4
27 2
28 0
29 74
30 100
31 36
32 16
33 8
34 4
35 2
36 0
37 148
38 214
39 76
40 36
41 16
42 8
43 4
44 2
45 0
46 286
47 414
48 160
49 68
50 32
51 16
52 8
53 4
54 2
55 0
56 572
57 876
58 328
59 140
60 68
61 32
62 16
63 8
64 4
65 2
66 0
67 1124
68 1722
69 640
70 276
71 132
72 64
73 32
74 16
75 8
76 4
77 2
78 0

List of values

[2, 2, 0, 4, 2, 0, 6, 4, 2, 0, 12, 12, 4, 2, 0, 20, 20, 8, 4, 2, 0, 40, 52, 20, 8, 4, 2, 0, 74, 100, 36, 16, 8, 4, 2, 0, 148, 214, 76, 36, 16, 8, 4, 2, 0, 286, 414, 160, 68, 32, 16, 8, 4, 2, 0, 572, 876, 328, 140, 68, 32, 16, 8, 4, 2, 0, 1124, 1722, 640, 276, 132, 64, 32, 16, 8, 4, 2, 0]