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

Terms

a(0) =1a(1) =7a(2) =39a(3) =191a(4) =875a(5) =3843a(6) =16423a(7) =68887a(8) =285219a(9) =1170059a(10) =4768127a(11) =19336863a(12) =78141883a(13) =314953555a(14) =1266977751a(15) =5089412519a(16) =20422176467a(17) =81882328731a(18) =328110270895