a(n)^2 is smallest square containing the string 'n'.

Terms

a(0) =0a(1) =1a(2) =5a(3) =6a(4) =2a(5) =5a(6) =4a(7) =24a(8) =9a(9) =3a(10) =10a(11) =34a(12) =11a(13) =37a(14) =12a(15) =34a(16) =4a(17) =42a(18) =43a(19) =14a(20) =45a(21) =11a(22) =15a(23) =48a(24) =18a(25) =5a(26) =51a(27) =52a(28) =17a(29) =23