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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.

A260251 Indices of terms in Recamán's sequence A005132 that do not appear for the first time.

Table of values

n a(n)
1 24
2 26
3 39
4 41
5 78
6 80
7 82
8 84
9 86
10 112
11 113
12 125
13 127
14 130
15 132
16 137
17 186
18 188
19 197
20 199
21 201
22 203
23 205
24 207
25 209
26 211
27 213
28 215
29 217
30 219
31 221
32 223
33 224
34 236
35 238
36 240
37 242
38 244
39 246
40 310
41 312
42 314
43 316
44 318
45 320
46 322
47 324
48 326
49 328
50 330
51 332
52 334
53 336
54 338
55 353

List of values

[24, 26, 39, 41, 78, 80, 82, 84, 86, 112, 113, 125, 127, 130, 132, 137, 186, 188, 197, 199, 201, 203, 205, 207, 209, 211, 213, 215, 217, 219, 221, 223, 224, 236, 238, 240, 242, 244, 246, 310, 312, 314, 316, 318, 320, 322, 324, 326, 328, 330, 332, 334, 336, 338, 353]