Sum of all parts of all compositions of n with at least two parts in increasing order.

Terms

a(0) =0a(1) =0a(2) =0a(3) =3a(4) =12a(5) =45a(6) =126a(7) =343a(8) =848a(9) =2034a(10) =4700a(11) =10648a(12) =23652a(13) =51935a(14) =112798a(15) =243120a(16) =520592a(17) =1109063a(18) =2352366a(19) =4971426a(20) =10473220a(21) =22003464a(22) =46115300a(23) =96440127a(24) =201288792a(25) =419381450a(26) =872351896a(27) =1811858058a(28) =3757992280a(29) =7784495839