G.f. A(x) satisfies A(x) = 1 + x*(1+x)^(3/2)*A(x)^(5/2).

Terms

a(0) =1a(1) =1a(2) =4a(3) =16a(4) =74a(5) =366a(6) =1900a(7) =10210a(8) =56315a(9) =317005a(10) =1813860a(11) =10518652a(12) =61684208a(13) =365177622a(14) =2179549853a(15) =13100686947a(16) =79232836206a(17) =481821573994