A115830 Sequence A115829 in binary.

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

Author

Antti Karttunen, Feb 01 2006

Keywords

• nonn
• base

Comments

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

Crossrefs

Cf. A007088, A115806, A115829.

Programs

Mathematica

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

Formula

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