338444

Appears in sequences

• Triangle arising from (4,2) tennis ball problem, read by rows.at n=48A078990
• a(n) = (2*4^n*binomial(2*n, n) - binomial(4*n + 1, 2*n)) / (n + 1).at n=6A079489
• Second column of triangular array in A079513.at n=12A079514