85022

Appears in sequences

• Total number of grid diagrams of nontrivial knots on grid size n.at n=2A163566
• a(n) = 2*a(n-1)-2*a(n-2)+a(n-3)+2*a(n-4) with a(0)=a(1)=0, a(2)=2, a(3)=3.at n=26A307688