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.

A056506 Number of periodic palindromic structures using a maximum of five different symbols.

Table of values

n a(n)
0 1
1 1
2 2
3 2
4 5
5 5
6 13
7 15
8 41
9 52
10 143
11 202
12 564
13 855
14 2433
15 3845
16 11101
17 18002
18 52662
19 86472
20 255128
21 422005
22 1252898
23 2079475
24 6197590
25 10306752
26 30796243
27 51263942
28 153411664
29 255514355
30 765393943
31 1275163905
32 3822001141
33 6368612302
34 19095317552
35 31821472612

List of values

[1, 1, 2, 2, 5, 5, 13, 15, 41, 52, 143, 202, 564, 855, 2433, 3845, 11101, 18002, 52662, 86472, 255128, 422005, 1252898, 2079475, 6197590, 10306752, 30796243, 51263942, 153411664, 255514355, 765393943, 1275163905, 3822001141, 6368612302, 19095317552, 31821472612]