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!)
 A171868 First differences of A171865. 4
 1, 2, 2, 5, 2, 5, 3, 4, 6, 5, 6, 3, 3, 5, 4, 3, 4, 3, 6, 9, 3, 5, 3, 6, 3, 4, 5, 6, 5, 4, 4, 5, 4, 4, 6, 4, 4, 6, 6, 5, 6, 4, 4, 9, 3, 3, 6, 4, 3, 10, 3, 4, 4, 6, 4, 5, 3, 3, 6, 6, 7, 3, 5, 4, 5, 4, 6, 6, 6, 5, 4, 6, 4, 4, 6, 4, 5, 4, 7, 3, 4, 5, 4, 8, 10, 3, 5, 5, 6, 3, 8, 4, 4, 6, 7, 6, 6, 10, 4, 4, 8, 3, 4, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS N. J. A. Sloane, Table of n, a(n) for n = 1..15098 PROG (Haskell) a171868 n = a171868_list !! (n-1) a171868_list = zipWith (-) (tail a171865_list) a171865_list -- Reinhard Zumkeller, Oct 31 2011 (Python) A181391_list, A171868_list, l = [0, 0], [1], 0 for n in range(1, 10**4): ....for m in range(n-1, -1, -1): ........if A181391_list[m] == A181391_list[n]: ............A181391_list.append(n-m) ............break ....else: ........A181391_list.append(0) ........A171868_list.append(n-l) ........l = n # Chai Wah Wu, Jan 02 2015 CROSSREFS Cf. A181391, A171865, A171888, A171887. Identical to A171889 except for the leading 0. - Jan Ritsema van Eck (j.ritsemavaneck(AT)planet.nl), Oct 19 2010 Sequence in context: A007610 A068066 A171889 * A292146 A334685 A340694 Adjacent sequences: A171865 A171866 A171867 * A171869 A171870 A171871 KEYWORD nonn AUTHOR N. J. A. Sloane, Oct 18 2010 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 June 13 17:32 EDT 2024. Contains 373391 sequences. (Running on oeis4.)