Number of 3Xn 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..3 3Xn array.
A219716
Number of 3Xn 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..3 3Xn array.
Terms
- a(0) =20a(1) =44a(2) =297a(3) =1751a(4) =7862a(5) =30452a(6) =106421a(7) =345175a(8) =1059499a(9) =3113829a(10) =8821007a(11) =24186180a(12) =64368220a(13) =166638599a(14) =420428489a(15) =1035522928a(16) =2493797431a(17) =5880625520a(18) =13596111695a(19) =30856241755a(20) =68811371991a(21) =150927167533a(22) =325853157602
External references
- oeis: A219716