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.

A056516 Number of primitive (period n) periodic palindromic structures using a maximum of five different symbols.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 3
5 4
6 10
7 14
8 36
9 50
10 137
11 201
12 548
13 854
14 2417
15 3839
16 11060
17 18001
18 52599
19 86471
20 254982
21 421989
22 1252695
23 2079474
24 6196990
25 10306747
26 30795387
27 51263890
28 153409228
29 255514354
30 765389950
31 1275163904
32 3821990040
33 6368612099
34 19095299549
35 31821472593

List of values

[1, 1, 1, 1, 3, 4, 10, 14, 36, 50, 137, 201, 548, 854, 2417, 3839, 11060, 18001, 52599, 86471, 254982, 421989, 1252695, 2079474, 6196990, 10306747, 30795387, 51263890, 153409228, 255514354, 765389950, 1275163904, 3821990040, 6368612099, 19095299549, 31821472593]