Triangle of rooted planar maps.

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =6a(5) =6a(6) =1a(7) =12a(8) =26a(9) =24a(10) =1a(11) =20a(12) =75a(13) =120a(14) =110a(15) =1a(16) =30a(17) =174a(18) =416a(19) =594a(20) =546a(21) =1a(22) =42a(23) =350a(24) =1176a(25) =2289a(26) =3094a(27) =2856a(28) =1a(29) =56