A066166 - cp's OEIS frontend

A066166 Stanley's children's game. Class of n (named) children forms into rings with exactly one child inside each ring. We allow the case when outer ring has only one child. a(n) gives number of possibilities, including clockwise order (or which hand is held), in each ring.

n	a(n)
2	2
3	3
4	20
5	90
6	594
7	4200
8	34544
9	316008
10	3207240
11	35699400
12	432690312
13	5672581200
14	79991160144
15	1207367605080
16	19423062612480
17	331770360922560
18	5997105160795584
19	114373526841360000
20	2295170834453089920

[2, 3, 20, 90, 594, 4200, 34544, 316008, 3207240, 35699400, 432690312, 5672581200, 79991160144, 1207367605080, 19423062612480, 331770360922560, 5997105160795584, 114373526841360000, 2295170834453089920]

cp's OEIS Frontend

A066166 Stanley's children's game. Class of n (named) children forms into rings with exactly one child inside each ring. We allow the case when outer ring has only one child. a(n) gives number of possibilities, including clockwise order (or which hand is held), in each ring.

Table of values

List of values