A242529 - cp's OEIS frontend

A242529 Number of cyclic arrangements (up to direction) of numbers 1,2,...,n such that any two neighbors are coprime.

n	a(n)
1	1
2	1
3	1
4	1
5	6
6	2
7	36
8	36
9	360
10	288
11	11016
12	3888
13	238464
14	200448
15	3176496
16	4257792
17	402573312
18	139511808
19	18240768000
20	11813990400
21	440506183680
22	532754620416
23	96429560832000
24	32681097216000
25	5244692024217600
26	6107246661427200
27	490508471914905600
28	468867166554931200
29	134183696369843404800

[1, 1, 1, 1, 6, 2, 36, 36, 360, 288, 11016, 3888, 238464, 200448, 3176496, 4257792, 402573312, 139511808, 18240768000, 11813990400, 440506183680, 532754620416, 96429560832000, 32681097216000, 5244692024217600, 6107246661427200, 490508471914905600, 468867166554931200, 134183696369843404800]

cp's OEIS Frontend

A242529 Number of cyclic arrangements (up to direction) of numbers 1,2,...,n such that any two neighbors are coprime.

Table of values

List of values