Number of 4Xn 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..2 4Xn array.
A219688
Number of 4Xn 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..2 4Xn array.
Terms
- a(0) =10a(1) =19a(2) =99a(3) =427a(4) =1531a(5) =5031a(6) =15763a(7) =47784a(8) =140586a(9) =401745a(10) =1116450a(11) =3022129a(12) =7979699a(13) =20573716a(14) =51835099a(15) =127704345a(16) =307858090a(17) =726741861a(18) =1681297548a(19) =3815152314a(20) =8498764539a(21) =18601381870a(22) =40034714647a(23) =84794977698a(24) =176874740063
External references
- oeis: A219688