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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.

A321918 Tetrangle where T(n,H(u),H(v)) is the coefficient of e(v) in p(u), where u and v are integer partitions of n, H is Heinz number, e is elementary symmetric functions, and p is power sum symmetric functions.

Table of values

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

List of values

[1, -2, 1, 0, 1, 3, -3, 1, 0, -2, 1, 0, 0, 1, -4, 2, 4, -4, 1, 0, 4, 0, -4, 1, 0, 0, 3, -3, 1, 0, 0, 0, -2, 1, 0, 0, 0, 0, 1, 5, -5, -5, 5, 5, -5, 1, 0, -4, 0, 2, 4, -4, 1, 0, 0, -6, 6, 3, -5, 1, 0, 0, 0, 4, 0, -4, 1, 0, 0, 0, 0, 3, -3, 1, 0, 0, 0, 0, 0, -2, 1]