Number of dyslexic rooted planar trees with n nodes.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =21a(6) =55a(7) =146a(8) =413a(9) =1194a(10) =3553a(11) =10756a(12) =33134a(13) =103273a(14) =325484a(15) =1034734a(16) =3314870a(17) =10688513a(18) =34662777a(19) =112976023a(20) =369876832a(21) =1215811262a(22) =4010932603a(23) =13275356936a(24) =44070010202a(25) =146698487202a(26) =489550622528