Begins with (1, 4); avoids 3-term arithmetic progressions.

Terms

a(0) =1a(1) =4a(2) =5a(3) =8a(4) =10a(5) =13a(6) =14a(7) =17a(8) =28a(9) =31a(10) =32a(11) =35a(12) =37a(13) =40a(14) =41a(15) =44a(16) =82a(17) =85a(18) =86a(19) =89a(20) =91a(21) =94a(22) =95a(23) =98a(24) =109a(25) =112a(26) =113a(27) =116a(28) =118a(29) =121