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%I
%S 1,1,1,2,4,8,16,31,61,120,235,460,901,1769,3471,6811,13367,26236,
%T 51497,101079,198399,389428,764384,1500372,2945008,5780612,11346484,
%U 22271478,43715623,85807323,168427136,330597667,648914509,1273723636,2500131931,4907390780
%N Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-7,...,7}.
%H Alois P. Heinz, <a href="/A239557/b239557.txt">Table of n, a(n) for n = 0..1000</a>
%Y Column k=7 of A239550.
%K nonn
%O 0,4
%A _Alois P. Heinz_, Mar 21 2014
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