Number of edge covers on the n-web graph.

Terms

a(0) =6a(1) =52a(2) =360a(3) =2576a(4) =18336a(5) =130624a(6) =930432a(7) =6627584a(8) =47208960a(9) =336274432a(10) =2395318272a(11) =17062105088a(12) =121535176704a(13) =865707900928