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 A178729 a(n) = n XOR 3n, where XOR is bitwise XOR. 8
 0, 2, 4, 10, 8, 10, 20, 18, 16, 18, 20, 42, 40, 42, 36, 34, 32, 34, 36, 42, 40, 42, 84, 82, 80, 82, 84, 74, 72, 74, 68, 66, 64, 66, 68, 74, 72, 74, 84, 82, 80, 82, 84, 170, 168, 170, 164, 162, 160, 162, 164, 170, 168, 170, 148, 146, 144, 146, 148, 138, 136, 138, 132, 130 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..5000 FORMULA a(n) = A005351(n) XOR A005352(n) (conjectured). a(n) = 2 * A184617(n). - Alois P. Heinz, Jul 21 2017 MATHEMATICA f[n_] := BitXor[n, 3 n]; Array[f, 70, 0] (* Robert G. Wilson v, Jun 09 2010 *) PROG (PARI) a(n) = bitxor(n, 3*n); \\ Michel Marcus, Jul 11 2017 (MAGMA) [BitwiseXor(n, 3*n): n in [0..80]]; // Vincenzo Librandi, Jul 11 2017 CROSSREFS Cf. A048724, A048725, A178731, A178732, A178733, A178734, A178735, A178736. - Robert G. Wilson v, Jun 09 2010 Cf. A184617. Sequence in context: A331708 A227289 A200742 * A124108 A173824 A097211 Adjacent sequences:  A178726 A178727 A178728 * A178730 A178731 A178732 KEYWORD nonn AUTHOR Dmitry Kamenetsky, Jun 08 2010 EXTENSIONS a(30) onwards from Robert G. Wilson v, Jun 09 2010 STATUS approved

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Last modified September 21 00:14 EDT 2021. Contains 347596 sequences. (Running on oeis4.)