A318128 - cp's OEIS frontend

A318128 Number of set-systems (finite sets of finite nonempty sets) with union {1,2,...,n} and intersection {}.

n	a(n)
0	1
1	0
2	2
3	84
4	31478
5	2147000136
6	9223371998203475474
7	170141183460469231537996491257596836636
8	57896044618658097711785492504343953922551603929769020459976077632195066756398

[1, 0, 2, 84, 31478, 2147000136, 9223371998203475474, 170141183460469231537996491257596836636, 57896044618658097711785492504343953922551603929769020459976077632195066756398]

cp's OEIS Frontend

A318128 Number of set-systems (finite sets of finite nonempty sets) with union {1,2,...,n} and intersection {}.

Table of values

List of values