39154389145domain: NAppears in sequencesa(0)=1, a(1)=1, a(2)=1, a(n) = 2*a(n-1) + a(n-2) + 1.at n=29A033539a(n) = 6*a(n-1) - a(n-2) + 2, with a(0)=1, a(1)=4.at n=14A072221Expansion of (5-x^2)/((1+x)*(1-6*x+x^2)).at n=13A098212a(0)=1, a(1)=25, a(2)=865; a(n) = 35*(a(n-1)-a(n-2))+a(n-3).at n=7A350983