Size of the largest subset of the numbers [1...n] which doesn't contain a 4-term arithmetic progression.

A003003

Size of the largest subset of the numbers [1...n] which doesn't contain a 4-term arithmetic progression.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =3a(4) =4a(5) =5a(6) =5a(7) =6a(8) =7a(9) =8a(10) =8a(11) =8a(12) =9a(13) =9a(14) =10a(15) =10a(16) =11a(17) =11a(18) =12a(19) =12a(20) =13a(21) =13a(22) =14a(23) =14a(24) =15a(25) =15a(26) =16a(27) =17a(28) =17a(29) =18

External references