The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A098816 a(1)=0, a(2)=1, a(n) = ceiling((3/2) * |a(n-1) - a(n-2)|). 0
 0, 1, 2, 2, 0, 3, 5, 3, 3, 0, 5, 8, 5, 5, 0, 8, 12, 6, 9, 5, 6, 2, 6, 6, 0, 9, 14, 8, 9, 2, 11, 14, 5, 14, 14, 0, 21, 32, 17, 23, 9, 21, 18, 5, 20, 23, 5, 27, 33, 9, 36, 41, 8, 50, 63, 20, 65, 68, 5, 95, 135, 60, 113, 80, 50, 45, 8, 56, 72, 24, 72, 72, 0, 108, 162, 81, 122, 62, 90, 42, 72, 45, 41, 6, 53, 71, 27, 66, 59, 11 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Sequence becomes periodic with period 193. For which values of lambda does the sequence (f(n)) defined by f(1)=0, f(2)=1, f(n) = ceiling(lambda * |f(n-1) - f(n-2)|) ultimately become periodic? LINKS FORMULA For n >= 19, a(n+193) = a(n). MATHEMATICA RecurrenceTable[{a[1]==0, a[2]==1, a[n]==Ceiling[3/2 Abs[a[n-1]-a[n-2]]]}, a, {n, 90}] (* Harvey P. Dale, Mar 14 2015 *) CROSSREFS Sequence in context: A188333 A283269 A201947 * A214639 A319495 A216973 Adjacent sequences:  A098813 A098814 A098815 * A098817 A098818 A098819 KEYWORD nonn AUTHOR Benoit Cloitre, Nov 02 2004 EXTENSIONS Corrected and extended by Harvey P. Dale, Mar 14 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 18 20:58 EDT 2021. Contains 347536 sequences. (Running on oeis4.)