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

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =24a(5) =82a(6) =297a(7) =1121a(8) =4317a(9) =16900a(10) =67185a(11) =270480a(12) =1100122a(13) =4513809a(14) =18661618a(15) =77666327a(16) =325117967a(17) =1368001765a(18) =5782686120a(19) =24545144206a(20) =104573104040a(21) =447036252525