Sum of the first moments of all partitions of n with weights starting at 0.

Terms

a(0) =0a(1) =0a(2) =1a(3) =4a(4) =12a(5) =26a(6) =57a(7) =103a(8) =191a(9) =320a(10) =537a(11) =843a(12) =1342a(13) =2015a(14) =3048a(15) =4457a(16) =6509a(17) =9250a(18) =13170a(19) =18316a(20) =25483a(21) =34853a(22) =47556a(23) =64017a(24) =86063a(25) =114285a(26) =151462a(27) =198871a(28) =260426a(29) =338275