G.f. A(x) satisfies: A(x*R(x)) = x^2 + x^3 where A(R(x)) = x.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-2a(4) =6a(5) =-17a(6) =45a(7) =-123a(8) =360a(9) =-1085a(10) =3271a(11) =-9905a(12) =30417a(13) =-94646a(14) =296783a(15) =-935520a(16) =2965416a(17) =-9453976a(18) =30290553a(19) =-97451634a(20) =314677936a(21) =-1019627874a(22) =3314384312a(23) =-10804817731a(24) =35315932902a(25) =-115711014523a(26) =379974811324