cp's OEIS Frontend

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.

A173997 Irregular triangle by columns derived from (1, 2, 3, ...) * (1, 2, 3, ...).

Table of values

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

List of values

[1, 2, 3, 2, 4, 4, 5, 6, 3, 6, 8, 6, 7, 10, 9, 4, 8, 12, 12, 8, 9, 14, 15, 12, 5, 10, 16, 18, 16, 10, 11, 18, 21, 20, 15, 6, 12, 20, 24, 24, 20, 12, 13, 22, 27, 28, 25, 18, 7, 14, 24, 30, 32, 30, 24, 14, 15, 26, 33, 36, 35, 30, 21, 8, 16, 28, 36, 40, 40, 36, 28, 16]

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

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