Number of minimal edge covers in the n-double cone graph.

Terms

a(0) =0a(1) =1a(2) =21a(3) =58a(4) =149a(5) =566a(6) =1676a(7) =5482a(8) =18021a(9) =59665a(10) =199700a(11) =670517a(12) =2259384a(13) =7624878a(14) =25759564a(15) =87078065a(16) =294452965a(17) =995889190a(18) =3368616437a(19) =11395096538a(20) =38547768152a(21) =130403228310a(22) =441145535869