A086365 - cp's OEIS frontend

A086365 n-th Bell number of type D: Number of symmetric partitions of {-n,...,n}\{0} such that none of the subsets is of the form {j,-j}.

n	a(n)
0	1
1	4
2	15
3	75
4	428
5	2781
6	20093
7	159340
8	1372163
9	12725447
10	126238060
11	1332071241
12	14881206473
13	175297058228
14	2169832010759
15	28136696433171
16	381199970284620
17	5383103100853189
18	79065882217154085
19	1205566492711167004
20	19049651311462785947

[1, 4, 15, 75, 428, 2781, 20093, 159340, 1372163, 12725447, 126238060, 1332071241, 14881206473, 175297058228, 2169832010759, 28136696433171, 381199970284620, 5383103100853189, 79065882217154085, 1205566492711167004, 19049651311462785947]

cp's OEIS Frontend

A086365 n-th Bell number of type D: Number of symmetric partitions of {-n,...,n}\{0} such that none of the subsets is of the form {j,-j}.

Table of values

List of values