211612

Appears in sequences

• Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 n X 2 array.at n=13A219367
• a(n) = n! * Sum_{k=0..n} (-1)^(n-k) * binomial(k+4,5) / k!.at n=10A368587