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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.

A178408 Triangle T(n,k) read by rows. Each column is the Mobius function "recurrence" with the previous column as input.

Table of values

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

List of values

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