Expansion of 1/(1-x*sqrt(1+4*x^2)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =5a(6) =9a(7) =21a(8) =29a(9) =31a(10) =65a(11) =143a(12) =181a(13) =183a(14) =441a(15) =1019a(16) =1165a(17) =893a(18) =2929a(19) =7829a(20) =7589a(21) =1677a(22) =19305a(23) =66585a(24) =49661a(25) =-44279a(26) =126881a(27) =638085a(28) =325525a(29) =-1024831