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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.

A257329 Construct spiral of numbers on square grid as in Comments; sequence gives terms along the "2" arm.

Table of values

n a(n)
1 2
2 11
3 13
4 25
5 21
6 37
7 27
8 10
9 39
10 20
11 71
12 24
13 85
14 32
15 95
16 107
17 115
18 121
19 125
20 46
21 145
22 151
23 155
24 99
25 167
26 105
27 181
28 117
29 197
30 205
31 211
32 141
33 223
34 147
35 76
36 159
37 86
38 263
39 72
40 259
41 135
42 289
43 30
44 311
45 60
46 301
47 94
48 337
49 116
50 341
51 343
52 110
53 359
54 112
55 237
56 122
57 389

List of values

[2, 11, 13, 25, 21, 37, 27, 10, 39, 20, 71, 24, 85, 32, 95, 107, 115, 121, 125, 46, 145, 151, 155, 99, 167, 105, 181, 117, 197, 205, 211, 141, 223, 147, 76, 159, 86, 263, 72, 259, 135, 289, 30, 311, 60, 301, 94, 337, 116, 341, 343, 110, 359, 112, 237, 122, 389]

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

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