Number of partitions of n into two sorts of parts having exactly 4 parts of the second sort.

Terms

a(0) =1a(1) =6a(2) =22a(3) =63a(4) =155a(5) =342a(6) =700a(7) =1343a(8) =2463a(9) =4323a(10) =7361a(11) =12139a(12) =19581a(13) =30819a(14) =47697a(15) =72388a(16) =108390a(17) =159752a(18) =232833a(19) =334917a(20) =477270a(21) =672589a(22) =940222a(23) =1301954a(24) =1790117a(25) =2441168a(26) =3308341a(27) =4451294a(28) =5955870a(29) =7918574