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.

A208534 Number of n-bead necklaces of 7 colors not allowing reversal, with no adjacent beads having the same color.

Table of values

n a(n)
1 7
2 21
3 70
4 336
5 1554
6 7826
7 39990
8 210126
9 1119790
10 6047412
11 32981550
12 181402676
13 1004668770
14 5597460306
15 31345666730
16 176319474366
17 995685849690
18 5642220380006
19 32071565263710
20 182807925027504

List of values

[7, 21, 70, 336, 1554, 7826, 39990, 210126, 1119790, 6047412, 32981550, 181402676, 1004668770, 5597460306, 31345666730, 176319474366, 995685849690, 5642220380006, 32071565263710, 182807925027504]

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

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