%I #31 Apr 14 2021 05:27:24
%S 1,9,27,20457529,87463589042698969
%N Terms in A025475 that are palindromes in base 2.
%e 9 = 1001_2.
%e 27 = 11011_2.
%e 20457529 = 1001110000010100000111001_2.
%Y Intersection of A006995 and A025475.
%Y Cf. A029983.
%K nonn,base,more
%O 1,2
%A _Alex Ratushnyak_, May 04 2013
%E Definition clarified by _Chai Wah Wu_, Mar 18 2018
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