This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A133464 a(3n)=4^n, a(3n+1)=2*4^n, a(3n+2)=3*4^n. 6
 1, 2, 3, 4, 8, 12, 16, 32, 48, 64, 128, 192, 256, 512, 768, 1024, 2048, 3072, 4096, 8192, 12288, 16384, 32768, 49152, 65536, 131072, 196608, 262144, 524288, 786432, 1048576, 2097152, 3145728, 4194304, 8388608, 12582912, 16777216, 33554432 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS a(n) = A140740(n+3,3). - Reinhard Zumkeller, May 26 2008 LINKS Index entries for linear recurrences with constant coefficients, signature (0, 0, 4). FORMULA O.g.f.: -(1+2*x+3*x^2)/(-1+4*x^3) . 2*a(n)-a(n+1) = abs(A117902(n+1)). - R. J. Mathar, Nov 30 2007 a(n+1) = a(n) + a(n - n mod 3). - Reinhard Zumkeller, May 26 2008 MATHEMATICA LinearRecurrence[{0, 0, 4}, {1, 2, 3}, 40] (* Harvey P. Dale, Jun 07 2012 *) PROG (PARI) a(n)=4^(n\3)*(n%3+1) \\ Charles R Greathouse IV, Oct 07 2015 CROSSREFS Cf. A000079, A038754, A140730, A037124. Sequence in context: A189375 A262975 A062923 * A273731 A013914 A228718 Adjacent sequences:  A133461 A133462 A133463 * A133465 A133466 A133467 KEYWORD nonn,easy AUTHOR Paul Curtz, Nov 28 2007 EXTENSIONS Edited by R. J. Mathar, Nov 30 2007 More terms from Reinhard Zumkeller, May 26 2008 STATUS approved

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

Last modified October 17 16:42 EDT 2019. Contains 328120 sequences. (Running on oeis4.)