%I #13 Dec 21 2013 03:05:10
%S 1,3,4523,11991,18197,66075,72225,141683,1092489,3168099,6001209,
%T 6226335,6435309,12489657,17906499,50429883,51928701,68301841,
%U 295742437,390117873,542959199,554456167,566494057
%N Odd numbers whose square's binary reversal is also a square.
%C A003166 is a subsequence, except A003166(1)=0.
%C All odd numbers n such that A068527(A030101(n^2)) = 0. - _Antti Karttunen_, Dec 20 2013
%F a(n) = sqrt(A229687(n)).
%o (Scheme, with _Antti Karttunen_'s IntSeq-library)
%o (define A229766 (MATCHING-POS 1 1 (lambda (n) (and (odd? n) (zero? (A068527 (A030101 (* n n))))))))
%Y Cf. A000290, A003166, A030101, A068527, A229687.
%K nonn,base
%O 1,2
%A _Alex Ratushnyak_, Dec 19 2013