Number of unrooted binary unordered tanglegrams of size n.

A259116

Number of unrooted binary unordered tanglegrams of size n.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =22a(6) =145a(7) =1875a(8) =31929a(9) =698183a(10) =18056523a(11) =538340256a(12) =18141423039a(13) =681939320185

External references