Expansion of -1/(1 - x * sqrt(1-4*x)).

Terms

a(0) =-1a(1) =-1a(2) =1a(3) =5a(4) =9a(5) =11a(6) =17a(7) =59a(8) =237a(9) =849a(10) =2861a(11) =9625a(12) =33057a(13) =115753a(14) =410581a(15) =1469325a(16) =5296449a(17) =19216691a(18) =70134489a(19) =257320475a(20) =948545125a(21) =3511308899a(22) =13047504065a(23) =48649662439a(24) =181967395749a(25) =682578873479