A261727 Length of longest prefix of n-th row in A261712 coinciding with row n+1.

1, 0, 0, 2, 0, 3, 0, 0, 0, 25, 46, 90, 172, 141, 275, 601, 1102, 2199, 4150

Offset

1,4

Comments

A261712(n+1,k) = A261712(n,k) for k = 1 .. a(n).

Links

Table of n, a(n) for n=1..19.

Prog

(Haskell)
a261727 n = a261727_list !! (n-1)
a261727_list = map (length . takeWhile (== 0)) $
                   zipWith (zipWith (-)) a261712_tabf $ tail a261712_tabf

Crossrefs

Cf. A261712, A261646, A261416.

Sequence in context: A035229 A348019 A285982 * A234579 A309332 A109362

Adjacent sequences: A261724 A261725 A261726 * A261728 A261729 A261730

Keyword

nonn,more

Author

Reinhard Zumkeller, Aug 31 2015

Status

approved