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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.

A236326 a(n)*Pi is the total length of irregular spiral (center points: 1, 2, 3, 4, 5; pattern 1) after n rotations.

Table of values

n a(n)
1 3
2 6
3 10
4 17
5 24
6 27
7 30
8 34
9 41
10 48
11 51
12 54
13 58
14 65
15 72
16 75
17 78
18 82
19 89
20 96
21 99
22 102
23 106
24 113
25 120
26 123
27 126
28 130
29 137
30 144
31 147
32 150
33 154
34 161
35 168
36 171
37 174
38 178
39 185
40 192
41 195
42 198
43 202
44 209
45 216
46 219
47 222
48 226
49 233
50 240
51 243
52 246
53 250
54 257
55 264
56 267
57 270
58 274
59 281
60 288
61 291
62 294
63 298
64 305
65 312
66 315
67 318
68 322

List of values

[3, 6, 10, 17, 24, 27, 30, 34, 41, 48, 51, 54, 58, 65, 72, 75, 78, 82, 89, 96, 99, 102, 106, 113, 120, 123, 126, 130, 137, 144, 147, 150, 154, 161, 168, 171, 174, 178, 185, 192, 195, 198, 202, 209, 216, 219, 222, 226, 233, 240, 243, 246, 250, 257, 264, 267, 270, 274, 281, 288, 291, 294, 298, 305, 312, 315, 318, 322]