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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.

A144693 Triangle read by rows, A000012 * (3*A144328 - 2*A000012), where A000012 means a lower triangular matrix of all 1's.

Table of values

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

List of values

[1, 2, 1, 3, 2, 4, 4, 3, 8, 7, 5, 4, 12, 14, 10, 6, 5, 16, 21, 20, 13, 7, 6, 20, 28, 30, 26, 16, 8, 7, 24, 35, 40, 39, 32, 19, 9, 8, 28, 42, 50, 52, 48, 38, 22, 10, 9, 32, 49, 60, 65, 64, 57, 44, 25, 11, 10, 36, 56, 70, 78, 80, 76, 66, 50, 28]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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