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Number of ballot sequences of length n having largest descent 9.
2

%I #5 Jun 22 2014 10:10:39

%S 1,12,133,1125,9238,68619,499415,3490873,24131903,163571510,

%T 1103866052,7385297559,49389978105,329450566234,2201955344742,

%U 14731655532265,98920296206493,666337183741714,4510099063773320,30665172472203015,209659934046564822,1441217280964444721

%N Number of ballot sequences of length n having largest descent 9.

%C Also number of ballot sequences of length n having largest ascent 9.

%Y Column k=9 of A238128 and of A238129.

%K nonn

%O 11,2

%A _Joerg Arndt_ and _Alois P. Heinz_, Jun 22 2014