Number of 4Xn 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 4Xn array.
A219855
Number of 4Xn 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 4Xn array.
Terms
- a(0) =15a(1) =33a(2) =225a(3) =1302a(4) =5950a(5) =23946a(6) =88110a(7) =303739a(8) =996299a(9) =3134799a(10) =9509576a(11) =27911314a(12) =79482488a(13) =220049935a(14) =593073991a(15) =1557365893a(16) =3986731613a(17) =9954711223a(18) =24261060624a(19) =57756733037a(20) =134430995512a(21) =306213956668a(22) =683311240461
External references
- oeis: A219855