G.f.: Product_{m>0} (1 + x^m + 2!*x^(2*m) + 3!*x^(3*m) + 4!*x^(4*m)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =30a(5) =13a(6) =48a(7) =61a(8) =142a(9) =170a(10) =378a(11) =430a(12) =1099a(13) =872a(14) =1304a(15) =2305a(16) =3626a(17) =4042a(18) =6900a(19) =8086a(20) =13634a(21) =17628a(22) =24915a(23) =29524a(24) =53998a(25) =51718a(26) =74953a(27) =96996a(28) =150104a(29) =172292