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

Terms

a(0) =1a(1) =4a(2) =10a(3) =19a(4) =28a(5) =28a(6) =1a(7) =-80a(8) =-242a(9) =-485a(10) =-728a(11) =-728a(12) =1a(13) =2188a(14) =6562a(15) =13123a(16) =19684a(17) =19684a(18) =1a(19) =-59048a(20) =-177146a(21) =-354293a(22) =-531440a(23) =-531440a(24) =1a(25) =1594324a(26) =4782970a(27) =9565939a(28) =14348908a(29) =14348908