Product of n and the sum of remainders of n mod k, for k = 1, 2, 3, ..., n.

Terms

a(0) =0a(1) =0a(2) =3a(3) =4a(4) =20a(5) =18a(6) =56a(7) =64a(8) =108a(9) =130a(10) =242a(11) =204a(12) =364a(13) =434a(14) =540a(15) =576a(16) =867a(17) =846a(18) =1216a(19) =1220a(20) =1470a(21) =1694a(22) =2254a(23) =2040a(24) =2575a(25) =2912a(26) =3375a(27) =3472a(28) =4379a(29) =4140