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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.

A321912 Tetrangle where T(n,H(u),H(v)) is the coefficient of m(v) in e(u), where u and v are integer partitions of n, H is Heinz number, m is monomial symmetric functions, and e is elementary symmetric functions.

Table of values

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

List of values

[1, 0, 1, 1, 2, 0, 0, 1, 0, 1, 3, 1, 3, 6, 0, 0, 0, 0, 1, 0, 1, 0, 2, 6, 0, 0, 0, 1, 4, 0, 2, 1, 5, 12, 1, 6, 4, 12, 24, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 5, 0, 0, 0, 1, 0, 3, 10, 0, 0, 1, 5, 2, 12, 30, 0, 0, 0, 2, 1, 7, 20, 0, 1, 3, 12, 7, 27, 60, 1, 5]