Number of partitions of 5n into exactly 4 parts.

Terms

a(0) =0a(1) =1a(2) =9a(3) =27a(4) =64a(5) =120a(6) =206a(7) =321a(8) =478a(9) =672a(10) =920a(11) =1215a(12) =1575a(13) =1991a(14) =2484a(15) =3042a(16) =3689a(17) =4410a(18) =5231a(19) =6136a(20) =7153a(21) =8262a(22) =9495a(23) =10830a(24) =12300a(25) =13881a(26) =15609a(27) =17457a(28) =19464a(29) =21600