Expansion of Product_{k>=1} (1 + 5*x^k).

Terms

a(0) =1a(1) =5a(2) =5a(3) =30a(4) =30a(5) =55a(6) =180a(7) =205a(8) =330a(9) =480a(10) =1230a(11) =1380a(12) =2255a(13) =3030a(14) =4530a(15) =8555a(16) =10680a(17) =15330a(18) =21330a(19) =29730a(20) =39480a(21) =67380a(22) =81505a(23) =116280a(24) =153030a(25) =210930a(26) =270805a(27) =370080a(28) =534330a(29) =675480