79121domain: NAppears in sequencesa(n) = (4*n^3 - 12*n^2 + 14*n + 3)/3.at n=40A161703Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=4, k=1 and l=-1.at n=8A176830a(n) = a(n-1) + 3*a(n-2) - 2*a(n-3) - 2*a(n-4), where a(0) = 1, a(1) = 2, a(2) = 3, a(3) = 4.at n=25A295619