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.

A257330 Construct spiral of numbers on square grid as in Comments; sequence gives terms along the "3" arm.

Table of values

n a(n)
1 3
2 4
3 17
4 29
5 31
6 41
7 49
8 33
9 61
10 18
11 73
12 51
13 77
14 57
15 28
16 109
17 34
18 127
19 38
20 87
21 62
22 157
23 40
24 163
25 169
26 175
27 187
28 193
29 64
30 209
31 203
32 221
33 227
34 239
35 153
36 245
37 171
38 269
39 177
40 281
41 293
42 299
43 189
44 313
45 201
46 106
47 207
48 70
49 219
50 100
51 347
52 84
53 361
54 96
55 379
56 243
57 391

List of values

[3, 4, 17, 29, 31, 41, 49, 33, 61, 18, 73, 51, 77, 57, 28, 109, 34, 127, 38, 87, 62, 157, 40, 163, 169, 175, 187, 193, 64, 209, 203, 221, 227, 239, 153, 245, 171, 269, 177, 281, 293, 299, 189, 313, 201, 106, 207, 70, 219, 100, 347, 84, 361, 96, 379, 243, 391]