a(n) = 1 if n is squarefree, otherwise 0.

Terms

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