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.

A289773 a(n) is the denominator of b(n) where b(n) = 1/(3*(1+2*A112765(n) - b(n-1))) and b(0) = 0, with A112765(n) being the 5-adic valuation of n.

Table of values

n a(n)
0 1
1 3
2 2
3 3
4 1
5 6
6 5
7 9
8 4
9 3
10 5
11 12
12 7
13 9
14 2
15 9
16 7
17 12
18 5
19 3
20 4
21 9
22 5
23 6
24 1
25 9
26 8
27 15
28 7
29 6
30 11
31 27
32 16
33 21
34 5
35 24
36 19
37 33
38 14
39 9
40 13
41 30
42 17
43 21
44 4
45 15
46 11
47 18
48 7
49 3
50 8
51 21
52 13
53 18
54 5
55 27
56 22
57 39
58 17
59 12
60 19
61 45
62 26
63 33
64 7
65 30
66 23
67 39
68 16
69 9
70 11
71 24
72 13
73 15
74 2
75 15
76 13

List of values

[1, 3, 2, 3, 1, 6, 5, 9, 4, 3, 5, 12, 7, 9, 2, 9, 7, 12, 5, 3, 4, 9, 5, 6, 1, 9, 8, 15, 7, 6, 11, 27, 16, 21, 5, 24, 19, 33, 14, 9, 13, 30, 17, 21, 4, 15, 11, 18, 7, 3, 8, 21, 13, 18, 5, 27, 22, 39, 17, 12, 19, 45, 26, 33, 7, 30, 23, 39, 16, 9, 11, 24, 13, 15, 2, 15, 13]