The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A026498 a(n) = t(1+3n), where t = A001285 (Thue-Morse sequence). 4
 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 1, 2, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 1, 2, 1, 1, 1, 2, 2, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 1, 2, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Michael De Vlieger, Table of n, a(n) for n = 0..10000 MATHEMATICA Array[1 + Mod[DigitCount[3 # + 1, 2, 1], 2] &, 105, 0] (* Michael De Vlieger, Oct 03 2019 *) PROG (PARI) a(n)=1+hammingweight(3*n+1)%2 \\ Charles R Greathouse IV, May 09 2016 CROSSREFS Cf. A001285, A026492, A026513. Sequence in context: A136754 A276788 A282625 * A140685 A055666 A251139 Adjacent sequences:  A026495 A026496 A026497 * A026499 A026500 A026501 KEYWORD nonn AUTHOR EXTENSIONS Name and Pari adapted to match offset in A001285 by Sean A. Irvine, Oct 03 2019 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 18 18:24 EDT 2022. Contains 353823 sequences. (Running on oeis4.)