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.

A051159 Triangle read by rows: T(n, k) = binomial(n mod 2, k mod 2) * binomial(n div 2, k div 2), where 'div' denotes integer division.

Table of values

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

List of values

[1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 2, 0, 1, 1, 1, 2, 2, 1, 1, 1, 0, 3, 0, 3, 0, 1, 1, 1, 3, 3, 3, 3, 1, 1, 1, 0, 4, 0, 6, 0, 4, 0, 1, 1, 1, 4, 4, 6, 6, 4, 4, 1, 1, 1, 0, 5, 0, 10, 0, 10, 0, 5, 0, 1, 1, 1, 5, 5, 10, 10, 10, 10, 5, 5, 1, 1, 1, 0, 6, 0, 15, 0, 20, 0, 15, 0, 6, 0, 1, 1, 1, 6, 6, 15, 15, 20, 20, 15, 15, 6, 6, 1, 1]