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.

A197878 a(n) = floor(2*(1 + sqrt(2))*n).

Table of values

n a(n)
1 4
2 9
3 14
4 19
5 24
6 28
7 33
8 38
9 43
10 48
11 53
12 57
13 62
14 67
15 72
16 77
17 82
18 86
19 91
20 96
21 101
22 106
23 111
24 115
25 120
26 125
27 130
28 135
29 140
30 144
31 149
32 154
33 159
34 164
35 168
36 173
37 178
38 183
39 188
40 193
41 197
42 202
43 207
44 212
45 217
46 222
47 226
48 231
49 236
50 241
51 246
52 251
53 255
54 260
55 265
56 270

List of values

[4, 9, 14, 19, 24, 28, 33, 38, 43, 48, 53, 57, 62, 67, 72, 77, 82, 86, 91, 96, 101, 106, 111, 115, 120, 125, 130, 135, 140, 144, 149, 154, 159, 164, 168, 173, 178, 183, 188, 193, 197, 202, 207, 212, 217, 222, 226, 231, 236, 241, 246, 251, 255, 260, 265, 270]