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.

A066316 Number of identity (asymmetric) bracelets (or necklaces) with n red and blue beads such that the beads switch colors when bracelet is turned over.

Table of values

n a(n)
4 1
5 5
6 24
7 91
8 340
9 1224
10 4365
11 15521
12 55311
13 197964
14 712243
15 2577105
16 9375360
17 34284971
18 125977464
19 464938189
20 1722817415
21 6407307543
22 23909159417
23 89491715105
24 335908316844
25 1264097675775
26 4768430557020
27 18027183349395

List of values

[1, 5, 24, 91, 340, 1224, 4365, 15521, 55311, 197964, 712243, 2577105, 9375360, 34284971, 125977464, 464938189, 1722817415, 6407307543, 23909159417, 89491715105, 335908316844, 1264097675775, 4768430557020, 18027183349395]

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

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