This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A168460 a(n)=10*n-a(n-1)-8, with a(1)=6. 0
 6, 6, 16, 16, 26, 26, 36, 36, 46, 46, 56, 56, 66, 66, 76, 76, 86, 86, 96, 96, 106, 106, 116, 116, 126, 126, 136, 136, 146, 146, 156, 156, 166, 166, 176, 176, 186, 186, 196, 196, 206, 206, 216, 216, 226, 226, 236, 236, 246, 246, 256, 256, 266, 266, 276, 276, 286 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Index to sequences with linear recurrences with constant coefficients, signature (1,1,-1). FORMULA a(n) = 2*A168283(n). a(n+1) = A017341(floor(n/2)). G.f. 2*x*(3+2*x^2) / ( (1+x)*(x-1)^2 ). - R. J. Mathar, Jan 04 2011 EXAMPLE For n=2, a(2)=10*2-6-8=6; n=3, a(3)=10*3-6-8=16; n=4, a(4)=10*4-16-8=16 MATHEMATICA RecurrenceTable[{a[1]==6, a[n]==10n-a[n-1]-8}, a, {n, 80}] (* or *) LinearRecurrence[{1, 1, -1}, {6, 6, 16}, 80]  (* From Harvey P. Dale, Apr 25 2011 *) CROSSREFS Sequence in context: A168414 A058563 A175561 * A038518 A151724 A000976 Adjacent sequences:  A168457 A168458 A168459 * A168461 A168462 A168463 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Nov 26 2009 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .