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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.

A221649 Tetrahedron E(n,j,k) = k*T(j,k)*p(n-j), where T(j,k) = 1 if k divides j otherwise 0.

Table of values

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

List of values

[1, 1, 1, 2, 2, 1, 2, 1, 0, 3, 3, 2, 4, 1, 0, 3, 1, 2, 0, 4, 5, 3, 6, 2, 0, 6, 1, 2, 0, 4, 1, 0, 0, 0, 5, 7, 5, 10, 3, 0, 9, 2, 4, 0, 8, 1, 0, 0, 0, 5, 1, 2, 3, 0, 0, 6, 11, 7, 14, 5, 0, 15, 3, 6, 0, 12, 2, 0, 0, 0, 10, 1, 2, 3, 0, 0, 6, 1, 0, 0, 0, 0, 0, 7]