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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.

A308465 Number of prefix normal palindromes of length n.

Table of values

n a(n)
1 2
2 2
3 3
4 3
5 5
6 4
7 8
8 7
9 12
10 11
11 21
12 18
13 36
14 31
15 57
16 55
17 104
18 91
19 182
20 166
21 308
22 292
23 562
24 512
25 1009
26 928
27 1755
28 1697
29 3247
30 2972
31 5906
32 5555
33 10506
34 10099
35 19542
36 18280
37 36002
38 33895
39 64958
40 63045
41 121887
42 114032
43 226065
44 215377
45 412749
46 399334
47 778196
48 735941

List of values

[2, 2, 3, 3, 5, 4, 8, 7, 12, 11, 21, 18, 36, 31, 57, 55, 104, 91, 182, 166, 308, 292, 562, 512, 1009, 928, 1755, 1697, 3247, 2972, 5906, 5555, 10506, 10099, 19542, 18280, 36002, 33895, 64958, 63045, 121887, 114032, 226065, 215377, 412749, 399334, 778196, 735941]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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