Number of free n-polysticks embedded in the square lattice with at least one cycle.

A348095

Number of free n-polysticks embedded in the square lattice with at least one cycle.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =10a(6) =42a(7) =254a(8) =1331a(9) =7358a(10) =39543a(11) =212911a(12) =1135876a(13) =6039878a(14) =31975124a(15) =168790048a(16) =888664299a(17) =4669177072

External references