a(n) = floor(1000/n).

Terms

a(0) =1000a(1) =500a(2) =333a(3) =250a(4) =200a(5) =166a(6) =142a(7) =125a(8) =111a(9) =100a(10) =90a(11) =83a(12) =76a(13) =71a(14) =66a(15) =62a(16) =58a(17) =55a(18) =52a(19) =50a(20) =47a(21) =45a(22) =43a(23) =41a(24) =40a(25) =38a(26) =37a(27) =35a(28) =34a(29) =33