a(1) = 2, a(n+1) = a(n)-th squarefree number > 1.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =17a(6) =29a(7) =46a(8) =74a(9) =119a(10) =195a(11) =319a(12) =521a(13) =859a(14) =1407a(15) =2315a(16) =3810a(17) =6267a(18) =10303a(19) =16942a(20) =27862a(21) =45822a(22) =75381a(23) =123998a(24) =203969a(25) =335507a(26) =551886a(27) =907818a(28) =1493294a(29) =2456374