Number of nX4 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX4 array.
A219848
Number of nX4 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX4 array.
Terms
- a(0) =10a(1) =33a(2) =218a(3) =1302a(4) =6367a(5) =28116a(6) =116212a(7) =452177a(8) =1661479a(9) =5791018a(10) =19242699a(11) =61244524a(12) =187461137a(13) =553667969a(14) =1582231440a(15) =4384799386a(16) =11806014470a(17) =30933256186a(18) =78981312321a(19) =196763074685a(20) =478829103169
External references
- oeis: A219848