Sum of the second moments of all partitions of n with weights starting from 0.

Terms

a(0) =0a(1) =0a(2) =1a(3) =6a(4) =22a(5) =58a(6) =141a(7) =289a(8) =579a(9) =1054a(10) =1885a(11) =3161a(12) =5280a(13) =8371a(14) =13220a(15) =20183a(16) =30605a(17) =45178a(18) =66448a(19) =95546a(20) =136877a(21) =192759a(22) =270146a(23) =373387a(24) =514187a(25) =699429a(26) =947846a(27) =1272067a(28) =1700456a(29) =2254007