1209982081

Appears in sequences

• Bisection of A000930.at n=28A002478
• Expansion of (1-x)^3/(1 - 4*x + 3*x^2 - x^3).at n=19A052529
• a(n) = Sum_{k=0..2*n} binomial(2*k,2*n-k).at n=14A391594