Begins with (2, 4); avoids 3-term arithmetic progressions.

Terms

a(0) =2a(1) =4a(2) =5a(3) =7a(4) =11a(5) =13a(6) =14a(7) =16a(8) =29a(9) =31a(10) =32a(11) =34a(12) =38a(13) =40a(14) =41a(15) =43a(16) =83a(17) =85a(18) =86a(19) =88a(20) =92a(21) =94a(22) =95a(23) =97a(24) =110a(25) =112a(26) =113a(27) =115a(28) =119a(29) =121