Expansion of (1/x) * Series_Reversion( x * (1+x)^2 / (1+x+x^3)^3 ).

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =13a(5) =31a(6) =91a(7) =313a(8) =988a(9) =3095a(10) =10377a(11) =35146a(12) =117682a(13) =400117a(14) =1381582a(15) =4779997a(16) =16599766a(17) =58095076a(18) =204319835a(19) =720756820a(20) =2552544940a(21) =9074710255a(22) =32356325145a(23) =115679362789a(24) =414701335849