195255

Appears in sequences

• a(n) = Sum_{k=0..floor(n/3)} binomial(n,3*k)*binomial(4*k,k)/(3*k+1).at n=15A226974
• Coefficient of x^2 in minimal polynomial of the continued fraction [1^n,1/3,1,1,1,...], where 1^n means n ones.at n=12A266701