%I #6 Mar 30 2012 18:59:02
%S 1,0,0,1,3,3,8,30,117,466,1960,8655,40391,200085,1051888,5844844,
%T 34131049,208344660,1324262256,8743620525,59891078347,425216195191,
%U 3126418416440,23778261543210,186815245299549,1513931016854598
%N Diagonal sums of a Chebyshev number triangle.
%C Diagonal sums of number triangle A101124.
%H <a href="/index/Ch#Cheby">Index entries for sequences related to Chebyshev polynomials.</a>
%F a(n)=sum{k=0..floor(n/2), if(k<nk, T(n2k, k), if(k=nk, 1, 0))} where T(n, k)=(n/2)sum{j=0..floor(n/2), C(nj, j)(1)^j*(2k)^(n2j)}.
%K easy,nonn
%O 0,5
%A _Paul Barry_, Dec 02 2004
