A066165 - cp's OEIS frontend

A066165 Variant of Stanley's children's game. Class of n (named) children forms into rings of at least two with exactly one child inside each ring. a(n) gives number of possibilities, including clockwise order (or which hand is held), in each ring.

n	a(n)
3	3
4	8
5	30
6	234
7	1680
8	13040
9	119448
10	1212120
11	13412520
12	161968872
13	2118607920
14	29813747040
15	449227822680
16	7216747374720
17	123128587713600
18	2223511629522624
19	42370586275466880
20	849664985938704000
21	17886165587251839360
22	394366490810199895680
23	9088843342633833461760

[3, 8, 30, 234, 1680, 13040, 119448, 1212120, 13412520, 161968872, 2118607920, 29813747040, 449227822680, 7216747374720, 123128587713600, 2223511629522624, 42370586275466880, 849664985938704000, 17886165587251839360, 394366490810199895680, 9088843342633833461760]

cp's OEIS Frontend

A066165 Variant of Stanley's children's game. Class of n (named) children forms into rings of at least two with exactly one child inside each ring. a(n) gives number of possibilities, including clockwise order (or which hand is held), in each ring.

Table of values

List of values