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.

A109848 Highest common factor of n and its 9's complement.

Table of values

n a(n)
1 1
2 1
3 3
4 1
5 1
6 3
7 1
8 1
9 9
10 1
11 11
12 3
13 1
14 1
15 3
16 1
17 1
18 9
19 1
20 1
21 3
22 11
23 1
24 3
25 1
26 1
27 9
28 1
29 1
30 3
31 1
32 1
33 33
34 1
35 1
36 9
37 1
38 1
39 3
40 1
41 1
42 3
43 1
44 11
45 9
46 1
47 1
48 3
49 1
50 1
51 3
52 1
53 1
54 9
55 11
56 1
57 3
58 1
59 1
60 3
61 1
62 1
63 9
64 1
65 1
66 33
67 1
68 1
69 3
70 1
71 1
72 9
73 1
74 1
75 3
76 1
77 11
78 3
79 1
80 1
81 9
82 1
83 1
84 3
85 1
86 1
87 3
88 11
89 1
90 9
91 1
92 1
93 3
94 1
95 1
96 3
97 1
98 1
99 99
100 1
101 1
102 3

List of values

[1, 1, 3, 1, 1, 3, 1, 1, 9, 1, 11, 3, 1, 1, 3, 1, 1, 9, 1, 1, 3, 11, 1, 3, 1, 1, 9, 1, 1, 3, 1, 1, 33, 1, 1, 9, 1, 1, 3, 1, 1, 3, 1, 11, 9, 1, 1, 3, 1, 1, 3, 1, 1, 9, 11, 1, 3, 1, 1, 3, 1, 1, 9, 1, 1, 33, 1, 1, 3, 1, 1, 9, 1, 1, 3, 1, 11, 3, 1, 1, 9, 1, 1, 3, 1, 1, 3, 11, 1, 9, 1, 1, 3, 1, 1, 3, 1, 1, 99, 1, 1, 3]