Numerators in the expansion of (1-sqrt(1-x^2))/(1-x).

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =5a(5) =5a(6) =11a(7) =11a(8) =93a(9) =93a(10) =193a(11) =193a(12) =793a(13) =793a(14) =1619a(15) =1619a(16) =26333a(17) =26333a(18) =53381a(19) =53381a(20) =215955a(21) =215955a(22) =436109a(23) =436109a(24) =3518265a(25) =3518265a(26) =7088533a(27) =7088533a(28) =28539857a(29) =28539857