Expansion of Product_{i>=1, j>=0} (1 + x^(i * 5^j)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =5a(7) =6a(8) =8a(9) =10a(10) =14a(11) =17a(12) =21a(13) =26a(14) =32a(15) =42a(16) =50a(17) =60a(18) =74a(19) =88a(20) =109a(21) =130a(22) =154a(23) =184a(24) =218a(25) =263a(26) =309a(27) =363a(28) =428a(29) =500