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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.

A072122 Numbers with 12 odd integers in their Collatz (or 3x+1) trajectory.

Table of values

n a(n)
1 39
2 78
3 79
4 153
5 156
6 157
7 158
8 305
9 306
10 307
11 312
12 314
13 315
14 316
15 317
16 610
17 611
18 612
19 613
20 614
21 624
22 628
23 629
24 630
25 631
26 632
27 634
28 647
29 683
30 687
31 1220
32 1221
33 1222
34 1224
35 1226
36 1228
37 1229
38 1241
39 1248
40 1256
41 1257
42 1258
43 1260
44 1261
45 1262
46 1264
47 1265
48 1268

List of values

[39, 78, 79, 153, 156, 157, 158, 305, 306, 307, 312, 314, 315, 316, 317, 610, 611, 612, 613, 614, 624, 628, 629, 630, 631, 632, 634, 647, 683, 687, 1220, 1221, 1222, 1224, 1226, 1228, 1229, 1241, 1248, 1256, 1257, 1258, 1260, 1261, 1262, 1264, 1265, 1268]

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

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