cp's OEIS Frontend

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.

A226605 Irregular array read by rows of numerators in which row n has one numerator from each irreducible cycle of n rational numbers under iteration by the 3x+1 function. (See Comments for selection and order of numerators.)

Table of values

n a(n)
1 -1
2 0
3 1
4 -5
5 1
6 -19
7 5
8 1
9 -65
10 19
11 23
12 5
13 7
14 1
15 -211
16 -65
17 -73
18 19
19 23
20 31
21 1
22 7
23 1
24 -665
25 -211
26 -227
27 65
28 -251
29 73
30 89
31 19
32 85
33 101
34 23
35 31
36 47
37 5
38 37
39 1
40 11
41 1
42 -2059
43 -665
44 -697
45 211
46 -745
47 227
48 259
49 13
50 251
51 283
52 73
53 331
54 89
55 121
56 19
57 319
58 17
59 101
60 19
61 23

List of values

[-1, 0, 1, -5, 1, -19, 5, 1, -65, 19, 23, 5, 7, 1, -211, -65, -73, 19, 23, 31, 1, 7, 1, -665, -211, -227, 65, -251, 73, 89, 19, 85, 101, 23, 31, 47, 5, 37, 1, 11, 1, -2059, -665, -697, 211, -745, 227, 259, 13, 251, 283, 73, 331, 89, 121, 19, 319, 17, 101, 19, 23]