78104

Appears in sequences

• Number of partially ordered sets with no isolated points and with n "lines": pairs (a,b) where a < b and there is no c with a < c < b. The lines form the minimal basis for the partial ordering.at n=9A022016
• Number of right triangles on a (n+1)X8 grid.at n=28A189812
• Molecular topological indices of the sun graphs.at n=25A192845