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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.

A221530 Triangle read by rows: T(n,k) = A000005(k)*A000041(n-k).

Table of values

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

List of values

[1, 1, 2, 2, 2, 2, 3, 4, 2, 3, 5, 6, 4, 3, 2, 7, 10, 6, 6, 2, 4, 11, 14, 10, 9, 4, 4, 2, 15, 22, 14, 15, 6, 8, 2, 4, 22, 30, 22, 21, 10, 12, 4, 4, 3, 30, 44, 30, 33, 14, 20, 6, 8, 3, 4, 42, 60, 44, 45, 22, 28, 10, 12, 6, 4, 2, 56, 84, 60, 66, 30, 44, 14, 20, 9, 8, 2, 6]

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