Number of dyslexic identity rooted planar trees with n nodes.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =7a(6) =18a(7) =48a(8) =133a(9) =373a(10) =1054a(11) =3011a(12) =8678a(13) =25216a(14) =73801a(15) =217476a(16) =644554a(17) =1920718a(18) =5750807a(19) =17293653a(20) =52208550a(21) =158179651a(22) =480806995a(23) =1465841157a(24) =4481166838a(25) =13733815975a(26) =42189399220a(27) =129883408346