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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.

A221650 Tetrahedron P(n,j,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 1
5 2
6 1
7 1
8 1
9 0
10 1
11 3
12 2
13 2
14 1
15 0
16 1
17 1
18 1
19 0
20 1
21 5
22 3
23 3
24 2
25 0
26 2
27 1
28 1
29 0
30 1
31 1
32 0
33 0
34 0
35 1
36 7
37 5
38 5
39 3
40 0
41 3
42 2
43 2
44 0
45 2
46 1
47 0
48 0
49 0
50 1
51 1
52 1
53 1
54 0
55 0
56 1
57 11
58 7
59 7
60 5
61 0
62 5
63 3
64 3
65 0
66 3
67 2
68 0
69 0
70 0
71 2
72 1
73 1
74 1
75 0
76 0
77 1
78 1
79 0
80 0
81 0
82 0
83 0
84 1

List of values

[1, 1, 1, 1, 2, 1, 1, 1, 0, 1, 3, 2, 2, 1, 0, 1, 1, 1, 0, 1, 5, 3, 3, 2, 0, 2, 1, 1, 0, 1, 1, 0, 0, 0, 1, 7, 5, 5, 3, 0, 3, 2, 2, 0, 2, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 11, 7, 7, 5, 0, 5, 3, 3, 0, 3, 2, 0, 0, 0, 2, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1]