Sum of remainders of n mod k, for k = 1, 2, 3, ..., n.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =4a(5) =3a(6) =8a(7) =8a(8) =12a(9) =13a(10) =22a(11) =17a(12) =28a(13) =31a(14) =36a(15) =36a(16) =51a(17) =47a(18) =64a(19) =61a(20) =70a(21) =77a(22) =98a(23) =85a(24) =103a(25) =112a(26) =125a(27) =124a(28) =151a(29) =138