a(n) = floor(1/(n-1) + 2/(n-2) + 3/(n-3) + ... + (n-1)/1).

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =4a(5) =6a(6) =8a(7) =11a(8) =13a(9) =16a(10) =19a(11) =22a(12) =25a(13) =28a(14) =31a(15) =34a(16) =38a(17) =41a(18) =44a(19) =48a(20) =51a(21) =55a(22) =59a(23) =62a(24) =66a(25) =70a(26) =74a(27) =78a(28) =81a(29) =85