a(n) is the smallest k > a(n-1) such that k^2 has no digit in common with a(n-1)^2.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =9a(9) =15a(10) =19a(11) =20a(12) =23a(13) =26a(14) =29a(15) =30a(16) =34a(17) =47a(18) =56a(19) =65a(20) =83a(21) =85a(22) =90a(23) =156a(24) =241a(25) =264a(26) =265a(27) =291a(28) =300a(29) =334