131135696

Appears in sequences

• Diagonal sums of the triangular matrix A190088.at n=17A190090
• Expansion of (1 - x - x^3)/((1 - x - x^3)^2 - 4*x^4).at n=26A375279
• a(n) = Sum_{k=0..floor(2*n/3)} binomial(4*n-4*k,2*k).at n=13A375308
• a(n) = Sum_{k=0..floor(n/2)} binomial(4*k,n-2*k).at n=26A375314