Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX4 array.
A220200
Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX4 array.
Terms
- a(0) =20a(1) =89a(2) =956a(3) =6855a(4) =44886a(5) =303148a(6) =2089805a(7) =14021160a(8) =88828793a(9) =530514956a(10) =3025654183a(11) =16666381611a(12) =89072121670a(13) =462114159737
External references
- oeis: A220200