Numbers k such that k^2 contains only digits {0,1,4}, not ending with zero.

Terms

a(0) =1a(1) =2a(2) =12a(3) =21a(4) =38a(5) =102a(6) =201a(7) =1002a(8) =1049a(9) =2001a(10) =10002a(11) =10679a(12) =20001a(13) =20348a(14) =100002a(15) =100549a(16) =200001a(17) =202512a(18) =375501a(19) =643771a(20) =1000002a(21) =1020348a(22) =2000001a(23) =2002848a(24) =10000002a(25) =10200201a(26) =20000001a(27) =20024988a(28) =20100102a(29) =100000002