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

Terms

a(0) =1a(1) =1a(2) =5a(3) =30a(4) =160a(5) =885a(6) =4810a(7) =26185a(8) =142005a(9) =769305a(10) =4159301a(11) =22455876a(12) =121057525a(13) =651737675a(14) =3504241650a(15) =18818709130a(16) =100945053055a(17) =540885242825