77923

Appears in sequences

• Number of different keys with n cuts, depths between 1 and 7 and depth difference at most 1 between adjacent cut depths.at n=10A002714
• Duplicate of A002714.at n=10A126361
• a(n) = Sum_{k=0..floor(n/4)} 2^k * binomial(n-3*k,k)^2.at n=18A387508