113736domain: NAppears in sequencesa(n) = Sum_{k=m..n} T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027948.at n=29A027959Expansion of (1-x-5*x^2)/(1-3*x-2*x^2-x^3).at n=10A070207