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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.

A261423 Largest palindrome <= n.

Table of values

n a(n)
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 9
11 11
12 11
13 11
14 11
15 11
16 11
17 11
18 11
19 11
20 11
21 11
22 22
23 22
24 22
25 22
26 22
27 22
28 22
29 22
30 22
31 22
32 22
33 33
34 33
35 33
36 33
37 33
38 33
39 33
40 33
41 33
42 33
43 33
44 44
45 44
46 44
47 44
48 44
49 44
50 44
51 44
52 44
53 44
54 44
55 55
56 55
57 55
58 55
59 55
60 55
61 55
62 55
63 55
64 55
65 55
66 66
67 66
68 66
69 66
70 66
71 66
72 66
73 66
74 66
75 66
76 66
77 77
78 77

List of values

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 77, 77]

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