Number of connected graphs with n nodes and no node a member of more than one cycle.

A317722

Number of connected graphs with n nodes and no node a member of more than one cycle.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =18a(6) =56a(7) =165a(8) =563a(9) =1937a(10) =7086a(11) =26396a(12) =101383a(13) =395821a(14) =1573317a(15) =6335511a(16) =25825861a(17) =106344587a(18) =441919711a(19) =1851114466a(20) =7809848543a(21) =33162241547a(22) =141636863809a(23) =608144007472

External references