Total number of parts in all overpartitions of n.

Terms

a(0) =2a(1) =6a(2) =16a(3) =34a(4) =68a(5) =128a(6) =228a(7) =390a(8) =650a(9) =1052a(10) =1664a(11) =2584a(12) =3940a(13) =5916a(14) =8768a(15) =12826a(16) =18552a(17) =26566a(18) =37672a(19) =52956a(20) =73848a(21) =102192a(22) =140420a(23) =191688a(24) =260038a(25) =350700a(26) =470384a(27) =627604a(28) =833236a(29) =1101080