G.f.: Product_{j>=1} (1 - x^j)^(-A000084(j)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =7a(4) =20a(5) =52a(6) =152a(7) =432a(8) =1292a(9) =3876a(10) =11900a(11) =36856a(12) =115728a(13) =366348a(14) =1170280a(15) =3764080a(16) =12186584a(17) =39673332a(18) =129812956a(19) =426648632a(20) =1407939880a(21) =4663160064a(22) =15496048156a(23) =51650777864a(24) =172639344440a(25) =578511221636