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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.

A336256 The cardinalities of the sets A(n), where A(0) is the empty set and A(n+1) is the union of A(n) and the Collatz orbit of the smallest natural number missing in A(n).

Table of values

n a(n)
0 0
1 1
2 4
3 9
4 10
5 20
6 23
7 24
8 33
9 34
10 39
11 42
12 43
13 46
14 141
15 142
16 145
17 146
18 149
19 161
20 162
21 170
22 173
23 174
24 179
25 180
26 187
27 190
28 191
29 204
30 205
31 208
32 209
33 212
34 220
35 221
36 230
37 231
38 232
39 239
40 240
41 243
42 244
43 247
44 252
45 253
46 256
47 257
48 260
49 261
50 262
51 267
52 270
53 271
54 284
55 285

List of values

[0, 1, 4, 9, 10, 20, 23, 24, 33, 34, 39, 42, 43, 46, 141, 142, 145, 146, 149, 161, 162, 170, 173, 174, 179, 180, 187, 190, 191, 204, 205, 208, 209, 212, 220, 221, 230, 231, 232, 239, 240, 243, 244, 247, 252, 253, 256, 257, 260, 261, 262, 267, 270, 271, 284, 285]

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

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