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Sequence A115829 in binary.
2

%I #5 Sep 29 2024 23:47:45

%S 0,11,110,1100,11000,110000,1100000,11000000,11000011,110000000,

%T 110000011,110000110,1100000000,1100000011,1100000110,1100001100,

%U 11000000000,11000000011,11000000110,11000001100,11000011000,101110100011,110000000000,110000000011,110000000110

%N Sequence A115829 in binary.

%C Differs from A115806 for the first time at n = 21, where A115806(21) = 110000000000 while a(21) = 101110100011.

%F a(n) = A007088(A115829(n)).

%t Map[FromDigits[IntegerDigits[#, 2]] &, Select[Range[0, 20000], BitXor[10*#, 11*#] == 21*# &]] (* _Paolo Xausa_, Sep 29 2024 *)

%Y Cf. A007088, A115806, A115829.

%K nonn,base

%O 0,2

%A _Antti Karttunen_, Feb 01 2006