Triangle of rooted planar maps, read by rows.

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =8a(5) =7a(6) =4a(7) =21a(8) =34a(9) =30a(10) =5a(11) =44a(12) =114a(13) =160a(14) =143a(15) =6a(16) =80a(17) =308a(18) =609a(19) =806a(20) =728a(21) =7a(22) =132a(23) =715a(24) =1908a(25) =3315a(26) =4256a(27) =3876a(28) =8a(29) =203