Expansion of (1-2*x^2) / ( 1-2*x-4*x^2+6*x^3 ).

Terms

a(0) =1a(1) =2a(2) =6a(3) =14a(4) =40a(5) =100a(6) =276a(7) =712a(8) =1928a(9) =5048a(10) =13536a(11) =35696a(12) =95248a(13) =252064a(14) =670944a(15) =1778656a(16) =4728704a(17) =12546368a(18) =33335616a(19) =88484480a(20) =235033216a(21) =623990656a(22) =1657207296a(23) =4400177920a(24) =11685241088a(25) =31027950080a(26) =82395796992a(27) =218791947776a(28) =580999383040