A110707 - cp's OEIS frontend

A110707 Number of linear arrangements of n blue, n red and n green items such that there are no adjacent items of the same color (first and last elements considered as adjacent).

n	a(n)
1	6
2	24
3	132
4	804
5	5196
6	34872
7	240288
8	1688244
9	12040188
10	86892384
11	633162360
12	4650680640
13	34390540320
14	255773538240
15	1911730760832
16	14350853162676
17	108139250403804
18	817629606524112
19	6200696697358344
20	47152195812692664

[6, 24, 132, 804, 5196, 34872, 240288, 1688244, 12040188, 86892384, 633162360, 4650680640, 34390540320, 255773538240, 1911730760832, 14350853162676, 108139250403804, 817629606524112, 6200696697358344, 47152195812692664]

cp's OEIS Frontend

A110707 Number of linear arrangements of n blue, n red and n green items such that there are no adjacent items of the same color (first and last elements considered as adjacent).

Table of values

List of values