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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.

A133981 Triangle read by rows: A000012 * A127701 + A127701 * A000012 - A000012 as infinite lower triangular matrices.

Table of values

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

List of values

[1, 4, 3, 5, 6, 5, 6, 7, 8, 7, 7, 8, 9, 10, 9, 8, 9, 10, 11, 12, 11, 9, 10, 11, 12, 13, 14, 13, 10, 11, 12, 13, 14, 15, 16, 15, 11, 12, 13, 14, 15, 16, 17, 18, 17, 12, 13, 14, 15, 16, 17, 18, 19, 20, 19, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 21, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 23]

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