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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.

A254835 Total number of nonagons in a variant of a nonagon expansion ("side-to-side", two consecutive sides) after n iterations.

Table of values

n a(n)
1 2
2 4
3 7
4 11
5 16
6 22
7 29
8 37
9 46
10 56
11 67
12 79
13 92
14 106
15 121
16 133
17 136
18 144
19 153
20 161
21 170
22 180
23 187
24 197
25 206
26 216
27 225
28 233
29 242
30 248
31 259
32 269
33 278
34 286
35 295
36 305
37 314
38 322
39 331
40 341
41 350
42 358
43 367
44 377
45 386
46 394
47 403
48 413
49 422
50 430
51 439
52 449
53 458
54 466
55 475
56 485
57 494
58 502

List of values

[2, 4, 7, 11, 16, 22, 29, 37, 46, 56, 67, 79, 92, 106, 121, 133, 136, 144, 153, 161, 170, 180, 187, 197, 206, 216, 225, 233, 242, 248, 259, 269, 278, 286, 295, 305, 314, 322, 331, 341, 350, 358, 367, 377, 386, 394, 403, 413, 422, 430, 439, 449, 458, 466, 475, 485, 494, 502]

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

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