OFFSET
1,4
COMMENTS
A set system is a finite set of finite nonempty sets. The density of a set system is the sum of sizes of each part (weight) minus the number of parts minus the number of vertices.
EXAMPLE
Triangle begins:
1
1 0
2 0 0
4 0 0 0
6 1 0 0 0
13 5 0 0 0 0
23 12 2 0 0 0 0
49 36 11 0 0 0 0 0
100 95 39 5 0 0 0 0 0
220 262 143 32 1 0 0 0 0 0
CROSSREFS
KEYWORD
AUTHOR
Gus Wiseman, Nov 01 2018
STATUS
approved