Number of series-reduced star graphs with n edges.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =9a(5) =22a(6) =62a(7) =177a(8) =560a(9) =1939a(10) =7067a(11) =27331a(12) =110871a(13) =468684a(14) =2057161a(15) =9341736