a(n) is the smallest integer that is the sum of n distinct terms of A075058.

Terms

a(0) =0a(1) =1a(2) =4a(3) =6a(4) =19a(5) =42a(6) =89a(7) =96a(8) =289a(9) =672a(10) =1441a(11) =2972a(12) =6039a(13) =12172a(14) =24441a(15) =48974a(16) =98043a(17) =196172a(18) =392419a(19) =784922a(20) =1569939a(21) =3139946a(22) =6279987a(23) =12560054a(24) =25120201