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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
OFFSET
1,2
COMMENTS
a(n) = (A219608(n+1) - A219608(n)) / 2.
LINKS
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
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Nov 26 2012
STATUS
approved