42725841

Appears in sequences

• Expansion of 1/(1 - x^2/(1-x)^5).at n=18A369803
• Expansion of (1 + x)^2/(1 - x^2*(1 + x)^3).at n=28A375317
• a(n) = Sum_{k=0..floor(2*n/5)} binomial(2*n-3*k,2*k).at n=22A391541