Number of unordered quadruples of self-avoiding paths with nodes that cover all vertices of a convex n-gon; one-node paths are allowed.

A360276

Number of unordered quadruples of self-avoiding paths with nodes that cover all vertices of a convex n-gon; one-node paths are allowed.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =10a(5) =105a(6) =1015a(7) =9625a(8) =90972a(9) =861420a(10) =8191920a(11) =78309000a(12) =752317280a(13) =7257522272a(14) =70223986560a(15) =680703296000

External references