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Sequence A115821 in binary.
2

%I #8 Sep 30 2024 03:21:43

%S 0,11,110,1011,1100,10110,11000,100011,101011,101100,101111,110000,

%T 1000110,1010110,1011000,1011011,1011110,1100000,10001011,10001100,

%U 10101011,10101100,10101111,10110000,10110110,10111100,11000000,11000011,100010110,100011000,100100011

%N Sequence A115821 in binary.

%H Paolo Xausa, <a href="/A115822/b115822.txt">Table of n, a(n) for n = 0..10000</a>

%F a(n) = A007088(A115821(n)).

%t Map[FromDigits[IntegerDigits[#, 2]] &, Select[Range[0, 1000], BitXor[6*#, 15*#] == 21*# &]] (* _Paolo Xausa_, Sep 30 2024 *)

%Y Cf. A007088, A115821.

%K nonn,base

%O 0,2

%A _Antti Karttunen_, Feb 01 2006