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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.

A143354 Triangle read by rows, (A051731)^4 * A128407, 1<=k<=n.

Table of values

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

List of values

[1, 4, -1, 4, 0, -1, 10, -4, 0, 0, 4, 0, 0, 0, -1, 16, -4, -4, 0, 0, 1, 4, 0, 0, 0, 0, 0, -1, 20, -10, 0, 0, 0, 0, 0, 0, 10, 0, -4, 0, 0, 0, 0, 0, 0, 16, -4, 0, 0, -4, 0, 0, 0, 0, 1, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 40, -16, -10, 0, 0, 4, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1]

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