%N Integers i such that 10*i XOR 11*i = 21*i.
%C XOR is A003987.
%H <a href="/index/Con#CongruXOR">Index entries for sequences defined by congruent products under XOR</a>
%Y Cf. Differs from A115805 for the first time at n=21, where A115805(21)=3072 while a(21)=2979. A115830 shows this sequence in binary.
%A _Antti Karttunen_, Feb 01 2006