The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A238324 a(1) = 1 and a(n+1) = if a(n) > 2*n+1 then a(n)-2*n-1 else a(n)+2*n+1. 3
 1, 4, 9, 2, 11, 22, 9, 24, 7, 26, 5, 28, 3, 30, 1, 32, 65, 30, 67, 28, 69, 26, 71, 24, 73, 22, 75, 20, 77, 18, 79, 16, 81, 14, 83, 12, 85, 10, 87, 8, 89, 6, 91, 4, 93, 2, 95, 190, 93, 192, 91, 194, 89, 196, 87, 198, 85, 200, 83, 202, 81, 204, 79, 206, 77 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Abs(a(n+1) - a(n)) = 2*n+1; a(A265327(n)) = n and a(m) != n for m < A265327(n). LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 MATHEMATICA nxt[{n_, a_}]:={n+1, If[a>2n+1, a-2n-1, a+2n+1]}; NestList[nxt, {1, 1}, 70][[All, 2]] (* Harvey P. Dale, Oct 07 2016 *) PROG (Haskell) a238324 n = a238324_list !! (n-1) a238324_list = scanl1 (\u v -> if u > v then u - v else u + v) [1, 3 ..] CROSSREFS Cf. A005408, A046901, A265327. Sequence in context: A196505 A203816 A070437 * A370952 A128204 A079049 Adjacent sequences: A238321 A238322 A238323 * A238325 A238326 A238327 KEYWORD nonn AUTHOR Reinhard Zumkeller, Dec 07 2015 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 28 18:29 EDT 2024. Contains 372919 sequences. (Running on oeis4.)