A097763 - cp's OEIS frontend

A097763 Number of different partitions of the set {1, 2, ..., n} into an even number of blocks such that each block contains at least 2 elements.

n	a(n)
1	0
2	0
3	0
4	3
5	10
6	25
7	56
8	224
9	1506
10	9951
11	57992
12	315425
13	1761552
14	11022180
15	78474748
16	603715831
17	4771273414
18	38070877273
19	309146434240
20	2598546954268
21	22887194502518
22	211388690471531
23	2031261113410564
24	20121026325645745

[0, 0, 0, 3, 10, 25, 56, 224, 1506, 9951, 57992, 315425, 1761552, 11022180, 78474748, 603715831, 4771273414, 38070877273, 309146434240, 2598546954268, 22887194502518, 211388690471531, 2031261113410564, 20121026325645745]

cp's OEIS Frontend

A097763 Number of different partitions of the set {1, 2, ..., n} into an even number of blocks such that each block contains at least 2 elements.

Table of values

List of values