Partial sums of A109890.

Terms

a(0) =1a(1) =3a(2) =6a(3) =12a(4) =16a(5) =24a(6) =36a(7) =45a(8) =50a(9) =60a(10) =75a(11) =100a(12) =120a(13) =144a(14) =160a(15) =192a(16) =240a(17) =270a(18) =288a(19) =324a(20) =351a(21) =364a(22) =371a(23) =424a(24) =530a(25) =795a(26) =954a(27) =1272a(28) =1484a(29) =1498