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A115830
Sequence A115829 in binary.
2
0, 11, 110, 1100, 11000, 110000, 1100000, 11000000, 11000011, 110000000, 110000011, 110000110, 1100000000, 1100000011, 1100000110, 1100001100, 11000000000, 11000000011, 11000000110, 11000001100, 11000011000, 101110100011, 110000000000, 110000000011, 110000000110
OFFSET
0,2
COMMENTS
Differs from A115806 for the first time at n = 21, where A115806(21) = 110000000000 while a(21) = 101110100011.
FORMULA
a(n) = A007088(A115829(n)).
MATHEMATICA
Map[FromDigits[IntegerDigits[#, 2]] &, Select[Range[0, 20000], BitXor[10*#, 11*#] == 21*# &]] (* Paolo Xausa, Sep 29 2024 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Antti Karttunen, Feb 01 2006
STATUS
approved