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

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =50a(6) =177a(7) =649a(8) =2436a(9) =9307a(10) =36080a(11) =141610a(12) =561732a(13) =2248709a(14) =9073415a(15) =36863549a(16) =150676275a(17) =619169360a(18) =2556446520a(19) =10600160707a(20) =44121921044a(21) =184291848864a(22) =772204252280