Squarefree part of n: a(n) is the smallest positive number m such that n/m is a square.

Terms

a(0) =1a(1) =2a(2) =3a(3) =1a(4) =5a(5) =6a(6) =7a(7) =2a(8) =1a(9) =10a(10) =11a(11) =3a(12) =13a(13) =14a(14) =15a(15) =1a(16) =17a(17) =2a(18) =19a(19) =5a(20) =21a(21) =22a(22) =23a(23) =6a(24) =1a(25) =26a(26) =3a(27) =7a(28) =29a(29) =30