A214312 - cp's OEIS frontend

A214312 a(n) is the number of all four-color bracelets (necklaces with turning over allowed) with n beads and the four colors are from a repertoire of n distinct colors, for n >= 4.

n	a(n)
4	3
5	120
6	2040
7	21420
8	183330
9	1320480
10	8691480
11	52727400
12	303958710
13	1674472800
14	8928735816
15	46280581620
16	234611247780
17	1166708558400
18	5710351190400
19	27565250985360
20	131495088522060
21	620771489730000
22	2903870526350640
23	13473567673441260
24	62061657617625204
25	283995655732351200

[3, 120, 2040, 21420, 183330, 1320480, 8691480, 52727400, 303958710, 1674472800, 8928735816, 46280581620, 234611247780, 1166708558400, 5710351190400, 27565250985360, 131495088522060, 620771489730000, 2903870526350640, 13473567673441260, 62061657617625204, 283995655732351200]

cp's OEIS Frontend

A214312 a(n) is the number of all four-color bracelets (necklaces with turning over allowed) with n beads and the four colors are from a repertoire of n distinct colors, for n >= 4.

Table of values

List of values