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%I #3 Mar 31 2012 12:35:48
%S 1,5,34,245,1827,13875,106612,825764,6432933,50331286,395107108,
%T 3109826951,24529022238,193811775229,1533585360032,12149640848560,
%U 96353382257041,764811311969813,6075374239940670,48292524527331788
%N Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=4*i and -4<p(i)-p(i-1)<=4
%C Paths down a n-high staggered-grid minimally right-leaning right triangle with interior neighbor fanout 2*4
%C Column 4 of A180915
%H R. H. Hardin, <a href="/A180909/b180909.txt">Table of n, a(n) for n=1..100</a>
%K nonn
%O 1,2
%A _R. H. Hardin_ Sep 23 2010