18478155

Appears in sequences

• a(n) = Sum_{k <= n/2 } binomial(n-2k, 3k).at n=34A137356
• Expansion of 1/(1 - x^3/(1-x)^5).at n=21A369804
• a(n) = Sum_{k=0..floor(2*n/5)} binomial(2*n-2*k,3*k).at n=17A392401