Expansion of 1/((1-x)*(1-2x)*(1-5x)*(1-6x)).

Terms

a(0) =1a(1) =14a(2) =131a(3) =1036a(4) =7497a(5) =51450a(6) =341167a(7) =2209592a(8) =14071013a(9) =88494406a(10) =551310123a(11) =3409583268a(12) =20966120449a(13) =128339843282a(14) =782754695399