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.

A019442 Numbers m such that a Hadamard matrix of order m exists.

Table of values

n a(n)
1 1
2 2
3 4
4 8
5 12
6 16
7 20
8 24
9 28
10 32
11 36
12 40
13 44
14 48
15 52
16 56
17 60
18 64
19 68
20 72
21 76
22 80
23 84
24 88
25 92
26 96
27 100
28 104
29 108
30 112
31 116
32 120
33 124
34 128
35 132
36 136
37 140
38 144
39 148
40 152
41 156
42 160
43 164
44 168
45 172
46 176
47 180
48 184
49 188
50 192
51 196
52 200
53 204
54 208
55 212
56 216
57 220
58 224
59 228
60 232
61 236
62 240

List of values

[1, 2, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240]

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

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