Number of 2 X n 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 2 X n array.
A220011
Number of 2 X n 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 2 X n array.
Terms
- a(0) =4a(1) =7a(2) =19a(3) =43a(4) =85a(5) =154a(6) =263a(7) =431a(8) =685a(9) =1062a(10) =1611a(11) =2395a(12) =3493a(13) =5002a(14) =7039a(15) =9743a(16) =13277a(17) =17830a(18) =23619a(19) =30891a(20) =39925a(21) =51034a(22) =64567a(23) =80911a(24) =100493a(25) =123782a(26) =151291a(27) =183579a(28) =221253a(29) =264970
External references
- oeis: A220011