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%I #5 Mar 30 2012 18:59:02
%S 1,3,6,14,40,131,471,1829,7620,33902,160362,803065,4241457,23546969,
%T 137002658,833225728,5284731576,34881786097,239147833907,
%U 1700114999791,12512735023124,95205884573428,747892058653238,6058264178225451
%N Row sums of a Chebyshev number triangle.
%C Row sums of number triangle A101161.
%F a(n)=sum{k=0..n, if(n=k, 1, 2T(n-k, (k+2)/2))} where T(n, k)=(n/2)sum{j=0..floor(n/2), C(n-j, j)(-1)^j*(2k)^(n-2j)}.
%Y Cf. A101163.
%K easy,nonn
%O 0,2
%A _Paul Barry_, Dec 03 2004