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.

A216953 Triangle read by rows: T(n,k) (n>=1, 1<=k<=n) = number of binary sequences of length n with minimal period k.

Table of values

n a(n)
1 2
2 2
3 2
4 2
5 0
6 6
7 2
8 2
9 0
10 12
11 2
12 0
13 0
14 0
15 30
16 2
17 2
18 6
19 0
20 0
21 54
22 2
23 0
24 0
25 0
26 0
27 0
28 126
29 2
30 2
31 0
32 12
33 0
34 0
35 0
36 240
37 2
38 0
39 6
40 0
41 0
42 0
43 0
44 0
45 504
46 2
47 2
48 0
49 0
50 30
51 0
52 0
53 0
54 0
55 990
56 2
57 0
58 0
59 0
60 0
61 0
62 0
63 0
64 0
65 0
66 2046
67 2
68 2
69 6
70 12
71 0
72 54
73 0
74 0
75 0
76 0
77 0
78 4020
79 2
80 0
81 0
82 0
83 0
84 0
85 0
86 0
87 0
88 0
89 0
90 0
91 8190
92 2
93 2
94 0
95 0
96 0
97 0
98 126
99 0
100 0
101 0
102 0
103 0
104 0
105 16254

List of values

[2, 2, 2, 2, 0, 6, 2, 2, 0, 12, 2, 0, 0, 0, 30, 2, 2, 6, 0, 0, 54, 2, 0, 0, 0, 0, 0, 126, 2, 2, 0, 12, 0, 0, 0, 240, 2, 0, 6, 0, 0, 0, 0, 0, 504, 2, 2, 0, 0, 30, 0, 0, 0, 0, 990, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2046, 2, 2, 6, 12, 0, 54, 0, 0, 0, 0, 0, 4020, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8190, 2, 2, 0, 0, 0, 0, 126, 0, 0, 0, 0, 0, 0, 16254]