700073

Appears in sequences

• a(n) = a(n-1) + a(n-2) + a(n-3); a(0) = -1, a(1) = 2, a(2) = 2.at n=23A100683
• Pairs of nodes in a complete binary tree that are at an absolute height difference of less than 2 from each other.at n=9A251743