Number of partitions of n, with two kinds of 1, 2, 3 and 4.

Terms

a(0) =1a(1) =2a(2) =5a(3) =10a(4) =20a(5) =35a(6) =62a(7) =102a(8) =167a(9) =262a(10) =407a(11) =614a(12) =919a(13) =1345a(14) =1952a(15) =2788a(16) =3950a(17) =5524a(18) =7671a(19) =10540a(20) =14388a(21) =19470a(22) =26190a(23) =34968a(24) =46439a(25) =61275a(26) =80455a(27) =105047a(28) =136541a(29) =176593