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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.

A254083 Number of primitive (=aperiodic) 2n-bead necklaces with colored beads of exactly n different colors.

Table of values

n a(n)
0 1
1 0
2 3
3 89
4 5100
5 510288
6 79419060
7 17758540440
8 5397245411040
9 2140495978400640
10 1073686615986821760
11 664582969579045104000
12 497566995304189636425600
13 443212653988584641970547200
14 463237380681508395317004249600
15 561422444732790213860667834854400

List of values

[1, 0, 3, 89, 5100, 510288, 79419060, 17758540440, 5397245411040, 2140495978400640, 1073686615986821760, 664582969579045104000, 497566995304189636425600, 443212653988584641970547200, 463237380681508395317004249600, 561422444732790213860667834854400]

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

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