Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX4 array.
A220006
Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX4 array.
Terms
- a(0) =20a(1) =43a(2) =479a(3) =4474a(4) =32959a(5) =204056a(6) =1209492a(7) =7316891a(8) =44430342a(9) =260942687a(10) =1458406289a(11) =7769314333a(12) =39698813306a(13) =195484409069a(14) =930466275825
External references
- oeis: A220006