A102736 - cp's OEIS frontend

A102736 Number of permutations of n elements without cycles whose length is a multiple of 3.

n	a(n)
0	1
1	1
2	2
3	4
4	16
5	80
6	400
7	2800
8	22400
9	179200
10	1792000
11	19712000
12	216832000
13	2818816000
14	39463424000
15	552487936000
16	8839806976000
17	150276718592000
18	2554704216064000
19	48539380105216000
20	970787602104320000
21	19415752042086400000
22	427146544925900800000
23	9824370533295718400000
24	225960522265801523200000
25	5649013056645038080000000
26	146874339472770990080000000
27	3818732826292045742080000000

[1, 1, 2, 4, 16, 80, 400, 2800, 22400, 179200, 1792000, 19712000, 216832000, 2818816000, 39463424000, 552487936000, 8839806976000, 150276718592000, 2554704216064000, 48539380105216000, 970787602104320000, 19415752042086400000, 427146544925900800000, 9824370533295718400000, 225960522265801523200000, 5649013056645038080000000, 146874339472770990080000000, 3818732826292045742080000000]

cp's OEIS Frontend

A102736 Number of permutations of n elements without cycles whose length is a multiple of 3.

Table of values

List of values