Expansion of 1/((1 - x)^9 + x^9).

Terms

a(0) =1a(1) =9a(2) =45a(3) =165a(4) =495a(5) =1287a(6) =3003a(7) =6435a(8) =12870a(9) =24309a(10) =43740a(11) =75411a(12) =124830a(13) =197505a(14) =293436a(15) =389367a(16) =389367a(17) =0a(18) =-1562274a(19) =-6216183a(20) =-18365697a(21) =-47600136a(22) =-113879520a(23) =-257123889a(24) =-554298228a(25) =-1148646906a(26) =-2297293812a(27) =-4443424371a(28) =-8313049440a(29) =-15011769204