%I #3 Aug 31 2015 02:53:23

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

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

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

%o (Haskell)

%o a261727 n = a261727_list !! (n-1)

%o a261727_list = map (length . takeWhile (== 0)) $

%o zipWith (zipWith (-)) a261712_tabf $ tail a261712_tabf

%Y Cf. A261712, A261646, A261416.

%K nonn,more

%O 1,4

%A _Reinhard Zumkeller_, Aug 31 2015