G.f.: Product_{k>=1, j>=1} 1/(1 - x^(j*k^4)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =11a(7) =15a(8) =22a(9) =30a(10) =42a(11) =56a(12) =77a(13) =101a(14) =135a(15) =176a(16) =232a(17) =298a(18) =387a(19) =493a(20) =632a(21) =799a(22) =1013a(23) =1270a(24) =1597a(25) =1988a(26) =2478a(27) =3066a(28) =3795a(29) =4666