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.

A045660 Number of 2n-bead balanced binary strings, rotationally equivalent to reversed complement, inequivalent to reverse and complement.

Table of values

n a(n)
0 0
1 0
2 0
3 12
4 32
5 120
6 300
7 784
8 1824
9 4296
10 9720
11 21824
12 47852
13 104832
14 226576
15 487392
16 1042208
17 2219520
18 4703880
19 9942016
20 20940152
21 43995544
22 92206400
23 192843776
24 402500844
25 838655520
26 1744509312
27 3623427624
28 7515501648

List of values

[0, 0, 0, 12, 32, 120, 300, 784, 1824, 4296, 9720, 21824, 47852, 104832, 226576, 487392, 1042208, 2219520, 4703880, 9942016, 20940152, 43995544, 92206400, 192843776, 402500844, 838655520, 1744509312, 3623427624, 7515501648]

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

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