283505

Appears in sequences

• Number of n-node rooted identity trees with thinning limbs and root outdegree (branching factor) 7.at n=12A245126
• a(n) = a(n-1) - a(n-2) + 3*a(n-3) with a(0) = 1, a(1) = 2 and a(2) = 4.at n=27A356849