6372720640

Appears in sequences

• 9-fold convolution of A000302 (powers of 4).at n=9A054339
• a(n) = (0^n + 4^n * binomial(2*n,n))/2.at n=9A098402
• a(n) = max{A380114(n, k) : k = 0..n}.at n=18A380115