Sum of all the parts in the partitions of 4n into 4 parts.

Terms

a(0) =4a(1) =40a(2) =180a(3) =544a(4) =1280a(5) =2592a(6) =4732a(7) =7968a(8) =12636a(9) =19120a(10) =27808a(11) =39168a(12) =53716a(13) =71960a(14) =94500a(15) =121984a(16) =155040a(17) =194400a(18) =240844a(19) =295120a(20) =358092a(21) =430672a(22) =513728a(23) =608256a(24) =715300a(25) =835848a(26) =971028a(27) =1122016a(28) =1289920a(29) =1476000