Least term in period of continued fraction for sqrt(n), as n runs through the nonsquares (A000037).

Terms

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