Number of fixed tree-like polyedges on the square lattice with n edges, rooted at a vertex.

A385120

Number of fixed tree-like polyedges on the square lattice with n edges, rooted at a vertex.

Terms

    a(0) =1a(1) =4a(2) =18a(3) =88a(4) =435a(5) =2184a(6) =11018a(7) =55888a(8) =284229a(9) =1448800a(10) =7396290a(11) =37804344a(12) =193405121a(13) =990117104a(14) =5072380140

External references