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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.

A370219 Irregular triangle T(n,k) read by rows: row n lists run-length encoding d_k values (see comments) for the properly nested string of parentheses encoded by A063171(n).

Table of values

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

List of values

[1, 1, 1, 0, 2, 1, 1, 1, 1, 0, 2, 0, 2, 1, 0, 1, 2, 0, 0, 3, 1, 1, 1, 1, 1, 1, 0, 2, 1, 0, 2, 1, 1, 0, 1, 2, 1, 0, 0, 3, 0, 2, 1, 1, 0, 2, 0, 2, 0, 1, 2, 1, 0, 1, 1, 2, 0, 1, 0, 3, 0, 0, 3, 1, 0, 0, 2, 2, 0, 0, 1, 3, 0, 0, 0, 4, 1, 1, 1, 1, 1, 1, 1, 1, 0, 2, 1, 1, 0, 2, 1]