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.

A254070 a(n) = -1 + (3/2)^(-1 + v(1 + F(4*n - 3)))*(1 + F(4*n - 3)), where v(y) is the 2-adic valuation of y, F(x) = (3*x + 1)/2^v(3*x + 1), and x == 1 (mod 2).

Table of values

n a(n)
1 1
2 1
3 17
4 5
5 13
6 1
7 29
8 17
9 25
10 17
11 161
12 17
13 37
14 5
15 65
16 53
17 49
18 13
19 125
20 29
21 61
22 1
23 101
24 53
25 73
26 29
27 269
28 41
29 85
30 17
31 137
32 161
33 97
34 25
35 233
36 53
37 109
38 17
39 173
40 89
41 121
42 161
43 1457
44 65
45 133
46 17
47 209
48 161
49 145
50 37
51 341
52 77
53 157
54 5
55 245
56 125
57 169
58 65
59 593
60 89
61 181
62 53
63 281
64 485
65 193
66 49
67 449
68 101
69 205
70 13

List of values

[1, 1, 17, 5, 13, 1, 29, 17, 25, 17, 161, 17, 37, 5, 65, 53, 49, 13, 125, 29, 61, 1, 101, 53, 73, 29, 269, 41, 85, 17, 137, 161, 97, 25, 233, 53, 109, 17, 173, 89, 121, 161, 1457, 65, 133, 17, 209, 161, 145, 37, 341, 77, 157, 5, 245, 125, 169, 65, 593, 89, 181, 53, 281, 485, 193, 49, 449, 101, 205, 13]