A002874 - cp's OEIS frontend

A002874 The number of partitions of {1..3n} that are invariant under a permutation consisting of n 3-cycles.

n	a(n)
0	1
1	2
2	8
3	42
4	268
5	1994
6	16852
7	158778
8	1644732
9	18532810
10	225256740
11	2933174842
12	40687193548
13	598352302474
14	9290859275060
15	151779798262202
16	2600663778494172
17	46609915810749130
18	871645673599372868
19	16971639450858467002
20	343382806080459389676

[1, 2, 8, 42, 268, 1994, 16852, 158778, 1644732, 18532810, 225256740, 2933174842, 40687193548, 598352302474, 9290859275060, 151779798262202, 2600663778494172, 46609915810749130, 871645673599372868, 16971639450858467002, 343382806080459389676]

cp's OEIS Frontend

A002874 The number of partitions of {1..3n} that are invariant under a permutation consisting of n 3-cycles.

Table of values

List of values