Generating function: 1/((1-x)*(1-x^2)^2*(1-x^3)^3*(1-x^4)^4).

Terms

a(0) =1a(1) =1a(2) =3a(3) =6a(4) =13a(5) =19a(6) =37a(7) =58a(8) =97a(9) =143a(10) =227a(11) =328a(12) =492a(13) =688a(14) =992a(15) =1364a(16) =1903a(17) =2551a(18) =3473a(19) =4586a(20) =6097a(21) =7911a(22) =10333a(23) =13226a(24) =16988a(25) =21454a(26) =27172a(27) =33938a(28) =42437a(29) =52423