80755domain: NAppears in sequencesa(n) = 1 + n + binomial(n+3,5).at n=24A154322Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 n X 2 array.at n=11A219465