Squarefree numbers: numbers that are not divisible by a square greater than 1.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =6a(5) =7a(6) =10a(7) =11a(8) =13a(9) =14a(10) =15a(11) =17a(12) =19a(13) =21a(14) =22a(15) =23a(16) =26a(17) =29a(18) =30a(19) =31a(20) =33a(21) =34a(22) =35a(23) =37a(24) =38a(25) =39a(26) =41a(27) =42a(28) =43a(29) =46