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.

A045657 Number of 2n-bead balanced binary strings, rotationally inequivalent to reverse, complement and reversed complement.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 80
6 384
7 2352
8 9856
9 42840
10 169360
11 676720
12 2631072
13 10265216
14 39779600
15 154498280
16 599565952
17 2330826752
18 9068429544
19 35332969392
20 137817174800
21 538204065336
22 2103971573264
23 8233197139552
24 32247054724768

List of values

[0, 0, 0, 0, 0, 80, 384, 2352, 9856, 42840, 169360, 676720, 2631072, 10265216, 39779600, 154498280, 599565952, 2330826752, 9068429544, 35332969392, 137817174800, 538204065336, 2103971573264, 8233197139552, 32247054724768]

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

Content is available under The OEIS End-User License Agreement.