Number of n-leaf binary trees that do not contain ((()())(()((()())()))) as a subtree.

A159773

Number of n-leaf binary trees that do not contain ((()())(()((()())()))) as a subtree.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =41a(6) =124a(7) =384a(8) =1212a(9) =3885a(10) =12613a(11) =41389a(12) =137055a(13) =457403a(14) =1536935a(15) =5195215a(16) =17654059a(17) =60273846a(18) =206654787a(19) =711236960a(20) =2456296348a(21) =8509633845a(22) =29565682912a(23) =102993430854a(24) =359654460720

External references