OFFSET
1,4
PROG
(Haskell)
a261727 n = a261727_list !! (n-1)
a261727_list = map (length . takeWhile (== 0)) $
zipWith (zipWith (-)) a261712_tabf $ tail a261712_tabf
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Reinhard Zumkeller, Aug 31 2015
STATUS
approved