1889968

Appears in sequences

• a(n) = Sum_{k=0..floor(n/4)} binomial(n+2*k,n-4*k).at n=19A373906
• Expansion of (1 + x^2 - x^3)/((1 + x^2 - x^3)^2 - 4*x^2).at n=27A376726
• Expansion of 1 / ((1-x)^4 - x^6).at n=24A392542