Begins with (1, 5); avoids 3-term arithmetic progressions.

Terms

a(0) =1a(1) =5a(2) =6a(3) =8a(4) =12a(5) =13a(6) =17a(7) =24a(8) =27a(9) =32a(10) =34a(11) =38a(12) =39a(13) =45a(14) =50a(15) =57a(16) =74a(17) =79a(18) =81a(19) =86a(20) =96a(21) =100a(22) =107a(23) =125a(24) =129a(25) =132a(26) =137a(27) =144a(28) =170a(29) =189