523540

Appears in sequences

• Expansion of e.g.f. -log(1 - Sum_{k>=1} x^(k^2) / (k^2)!).at n=10A329259
• a(n) = Sum_{k=0..floor(n/3)} binomial(k+3,3) * binomial(k,n-3*k)^2.at n=27A377150