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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.

A346632 Triangle read by rows giving the main diagonals of the matrices counting integer compositions by length and alternating sum (A345197).

Table of values

n a(n)
0 1
1 0
2 0
3 0
4 1
5 0
6 0
7 1
8 2
9 0
10 0
11 1
12 2
13 0
14 0
15 0
16 1
17 2
18 3
19 0
20 0
21 0
22 1
23 2
24 6
25 6
26 0
27 0
28 0
29 1
30 2
31 9
32 12
33 0
34 0
35 0
36 0
37 1
38 2
39 12
40 18
41 10
42 0
43 0
44 0
45 0
46 1
47 2
48 15
49 24
50 30
51 20
52 0
53 0
54 0
55 0
56 1
57 2
58 18
59 30
60 60
61 60
62 0
63 0
64 0
65 0
66 0
67 1
68 2
69 21
70 36
71 100
72 120
73 35
74 0
75 0
76 0
77 0

List of values

[1, 0, 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 2, 0, 0, 0, 1, 2, 3, 0, 0, 0, 1, 2, 6, 6, 0, 0, 0, 1, 2, 9, 12, 0, 0, 0, 0, 1, 2, 12, 18, 10, 0, 0, 0, 0, 1, 2, 15, 24, 30, 20, 0, 0, 0, 0, 1, 2, 18, 30, 60, 60, 0, 0, 0, 0, 0, 1, 2, 21, 36, 100, 120, 35, 0, 0, 0, 0]

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