A306021 - cp's OEIS frontend

A306021 Number of set-systems spanning {1,...,n} in which all sets have the same size.

n	a(n)
0	1
1	1
2	2
3	6
4	54
5	1754
6	1102746
7	68715913086
8	1180735735356265746734
9	170141183460507906731293351306656207090
10	7237005577335553223087828975127304177495735363998991435497132232365910414322

[1, 1, 2, 6, 54, 1754, 1102746, 68715913086, 1180735735356265746734, 170141183460507906731293351306656207090, 7237005577335553223087828975127304177495735363998991435497132232365910414322]

cp's OEIS Frontend

A306021 Number of set-systems spanning {1,...,n} in which all sets have the same size.

Table of values

List of values