51259

Appears in sequences

• Number of length 3 0..n arrays with each partial sum starting from the beginning no more than sqrt(3) standard deviations from its mean.at n=37A244942
• Number of n X 2 nonnegative integer arrays with upper left 0 and every value within 3 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.at n=28A252932
• a(n) = Sum_{k=0..floor(n/3)} binomial(n,k) * binomial(n-k-1,n-3*k).at n=13A389327