G.f.: Product_{m>0} (1 + x^m + 2!*x^(2*m) + 3!*x^(3*m)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =6a(5) =13a(6) =24a(7) =37a(8) =46a(9) =98a(10) =90a(11) =142a(12) =235a(13) =296a(14) =392a(15) =601a(16) =746a(17) =1018a(18) =1428a(19) =1702a(20) =2258a(21) =3132a(22) =3891a(23) =5044a(24) =6766a(25) =8134a(26) =10681a(27) =13812a(28) =16952a(29) =20996