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.

A340896 Irregular triangle in which the n-th row consists of all multiples of n that have fewer than twice as many divisors as n.

Table of values

n a(n)
1 1
2 2
3 4
4 3
5 9
6 4
7 8
8 16
9 5
10 25
11 6
12 12
13 18
14 7
15 49
16 8
17 16
18 32
19 64
20 9
21 27
22 81
23 10
24 20
25 50
26 11
27 121
28 12
29 24
30 36
31 48
32 13
33 169
34 14
35 28
36 98
37 15
38 45
39 75
40 16
41 32
42 64
43 128
44 256
45 17
46 289
47 18
48 36
49 54
50 162
51 19
52 361
53 20
54 40
55 80
56 100
57 21
58 63
59 147
60 22
61 44
62 242
63 23
64 529

List of values

[1, 2, 4, 3, 9, 4, 8, 16, 5, 25, 6, 12, 18, 7, 49, 8, 16, 32, 64, 9, 27, 81, 10, 20, 50, 11, 121, 12, 24, 36, 48, 13, 169, 14, 28, 98, 15, 45, 75, 16, 32, 64, 128, 256, 17, 289, 18, 36, 54, 162, 19, 361, 20, 40, 80, 100, 21, 63, 147, 22, 44, 242, 23, 529]

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

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