Reversion of y - y^2 - y^3 + y^4 + y^5.

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =9a(5) =31a(6) =112a(7) =422a(8) =1635a(9) =6473a(10) =26059a(11) =106327a(12) =438633a(13) =1826139a(14) =7661696a(15) =32358548a(16) =137447482a(17) =586747512a(18) =2515770639a(19) =10828744149a(20) =46772289354a(21) =202649880510a(22) =880475437710