All slopes (a(n)-a(m))/(n-m) are distinct; generated from 0 by greedy algorithm.

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =14a(5) =19a(6) =29a(7) =41a(8) =59a(9) =72a(10) =88a(11) =116a(12) =139a(13) =153a(14) =178a(15) =226a(16) =258a(17) =275a(18) =321a(19) =351a(20) =396a(21) =463a(22) =523a(23) =550a(24) =621a(25) =660a(26) =745a(27) =813a(28) =912a(29) =990