%I #4 Mar 31 2012 12:35:26
%S 1,4,9,25,49,121,225,484,897,1746,3062,5684,9515,16498,27028,44780,
%T 70648,113282,173670,269204,403919,607492,890300,1310859,1881880,
%U 2706891,3822825,5395027,7488282,10399032,14217293,19432101,26226966,35336049
%N Number of nondecreasing integer sequences of length 16 with sum zero and sum of absolute values 2n.
%C a(n) = A000041(n)^2 for n<=8
%C a(n) = A000041(n)^2 - cumulative A000712(2*n-1-length), 0 <= 2*n-1-length <= floor(n/2) [empirical].
%H R. H. Hardin, <a href="/A158150/b158150.txt">Table of n, a(n) for n=1..383</a>
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 13 2009
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