Sum of the sizes of the Durfee squares of all partitions of n.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =6a(5) =9a(6) =16a(7) =23a(8) =36a(9) =52a(10) =76a(11) =106a(12) =152a(13) =207a(14) =286a(15) =386a(16) =522a(17) =691a(18) =920a(19) =1202a(20) =1576a(21) =2038a(22) =2636a(23) =3373a(24) =4320a(25) =5478a(26) =6944a(27) =8738a(28) =10984a(29) =13717