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%I #5 Oct 27 2019 00:24:17
%S 1,4,144,441,1444,10404,40401,1004004,1100401,4004001,100040004,
%T 114041041,400040001,414041104,10000400004,10110101401,40000400001,
%U 41011110144,141001001001,414441100441,1000004000004,1041110041104
%N Squares composed of digits {0,1,4}, not ending with zero.
%H P. De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">Index to related sequences</a>
%H Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#014">Sporadic tridigital solutions</a>
%Y Cf. A058413.
%K nonn,base
%O 1,2
%A _Patrick De Geest_, Nov 15 2000
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