Number of jumps in all binary trees with n edges.

Terms

a(0) =0a(1) =0a(2) =2a(3) =13a(4) =64a(5) =285a(6) =1210a(7) =5005a(8) =20384a(9) =82212a(10) =329460a(11) =1314610a(12) =5230016a(13) =20764055a(14) =82317690a(15) =326012925a(16) =1290244800a(17) =5103910680a(18) =20183646780a(19) =79802261190a(20) =315492902400