Number of rooted binary trees with n leaves and each internal vertex colored in one of two colors.
A248748
Number of rooted binary trees with n leaves and each internal vertex colored in one of two colors.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =16a(4) =48a(5) =192a(6) =704a(7) =3072a(8) =12032a(9) =52736a(10) =219136a(11) =985088a(12) =4218880a(13) =19144704a(14) =84066304a(15) =387088384a(16) =1725497344a(17) =7989886976a(18) =36128948224a(19) =168658206720a(20) =770103574528
External references
- oeis: A248748