Number of p-trees of weight 2n + 1 in which all outdegrees are odd.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =37a(6) =107a(7) =336a(8) =1037a(9) =3367a(10) =10924a(11) =36438a(12) =121045a(13) =412789a(14) =1398168a(15) =4831708a(16) =16636297a(17) =58084208a(18) =202101971a(19) =712709423a(20) =2502000811a(21) =8880033929a(22) =31428410158a(23) =112199775788a(24) =399383181020