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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.

A181557 Indices k for which A031883(k) = 2 = A000959(k+1)-A000959(k), i.e., indices of (lesser) "twin" lucky numbers.

Table of values

n a(n)
1 1
2 3
3 5
4 9
5 13
6 16
7 18
8 27
9 29
10 35
11 38
12 46
13 49
14 53
15 59
16 69
17 75
18 80
19 83
20 87
21 90
22 95
23 100
24 102
25 106
26 117
27 120
28 136
29 138
30 141
31 143
32 149
33 151
34 154
35 156
36 159
37 164
38 167
39 178
40 182
41 185
42 187
43 201
44 205
45 211
46 215
47 217
48 221
49 227
50 229
51 232
52 246
53 248
54 256
55 265
56 271
57 283
58 286

List of values

[1, 3, 5, 9, 13, 16, 18, 27, 29, 35, 38, 46, 49, 53, 59, 69, 75, 80, 83, 87, 90, 95, 100, 102, 106, 117, 120, 136, 138, 141, 143, 149, 151, 154, 156, 159, 164, 167, 178, 182, 185, 187, 201, 205, 211, 215, 217, 221, 227, 229, 232, 246, 248, 256, 265, 271, 283, 286]

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

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