Expansion of (1/x) * Series_Reversion( x*(1-x)*(1-x^4) ).

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =48a(6) =160a(7) =549a(8) =1930a(9) =6919a(10) =25200a(11) =92976a(12) =346757a(13) =1305140a(14) =4951216a(15) =18912245a(16) =72675114a(17) =280761670a(18) =1089800270a(19) =4248149795a(20) =16623209911a(21) =65273370720a(22) =257115465600