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%I #19 Aug 08 2014 09:19:14
%S 0,1,6889,69169,109181601
%N Strobogrammatic squares: the same upside down (probably finite).
%C Square numbers which when written down and rotated by 180 degrees are unchanged.
%C Subsequence of squares in A000787. - _Derek Orr_ and _Michel Marcus_, Aug 04 2014
%Y Cf. A000787, A018849 (similar sequence).
%K nonn,base
%O 1,3
%A _David W. Wilson_
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