G.f.: Sum_{k>=0} x^k * Product_{j=1..5*k} (1 + x^j).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =10a(7) =13a(8) =17a(9) =22a(10) =28a(11) =36a(12) =45a(13) =56a(14) =69a(15) =86a(16) =106a(17) =130a(18) =159a(19) =192a(20) =232a(21) =279a(22) =333a(23) =397a(24) =472a(25) =557a(26) =657a(27) =773a(28) =905a(29) =1059