A285850 - cp's OEIS frontend

A285850 Number of ways n couples can sit in a row such that exactly one couple sits next to each other.

n	a(n)
0	0
1	2
2	8
3	288
4	15744
5	1401600
6	183582720
7	33223034880
8	7939197665280
9	2421184409763840
10	917547530747904000
11	422959572499916390400
12	233037523912020826521600
13	151234400024881955183001600
14	114177664785555609793383628800
15	99217287255932372662490234880000

[0, 2, 8, 288, 15744, 1401600, 183582720, 33223034880, 7939197665280, 2421184409763840, 917547530747904000, 422959572499916390400, 233037523912020826521600, 151234400024881955183001600, 114177664785555609793383628800, 99217287255932372662490234880000]

cp's OEIS Frontend

A285850 Number of ways n couples can sit in a row such that exactly one couple sits next to each other.

Table of values

List of values