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!)
 A219609 Half of first differences of A219608. 2
 1, 2, 1, 3, 2, 3, 3, 1, 3, 6, 3, 3, 2, 3, 3, 9, 3, 6, 3, 3, 1, 3, 6, 3, 3, 18, 3, 3, 9, 3, 6, 3, 3, 2, 3, 3, 9, 3, 6, 3, 3, 33, 3, 6, 3, 3, 18, 3, 3, 9, 3, 6, 3, 3, 1, 3, 6, 3, 3, 18, 3, 3, 9, 3, 6, 3, 3, 66, 3, 3, 9, 3, 6, 3, 3, 33, 3, 6, 3, 3, 18, 3, 3, 9 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) = (A219608(n+1) - A219608(n)) / 2. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 PROG (Haskell) a219609 n = a219609_list !! (n-1) a219609_list = map (`div` 2) \$ zipWith (-) (tail a219608_list) a219608_list CROSSREFS Sequence in context: A083290 A121842 A317963 * A087825 A263100 A261388 Adjacent sequences:  A219606 A219607 A219608 * A219610 A219611 A219612 KEYWORD nonn AUTHOR Reinhard Zumkeller, Nov 26 2012 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 May 17 05:13 EDT 2021. Contains 343965 sequences. (Running on oeis4.)