combinatorialInterpretation

4 triples
GPTKB property

Random triples
Subject Object
gptkb:large_Schröder_numbers number of ways to insert parentheses in a sequence of n+1 factors
gptkb:A002117 number of lattice paths from (0,0) to (n,n) not rising above the line y=x
gptkb:A002117 number of ways to choose n objects from 2n objects
gptkb:large_Schröder_numbers number of lattice paths from (0,0) to (n,n) using steps (1,0), (0,1), (1,1) that never rise above the line y=x