A219688 - cp's OEIS frontend

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.

n	a(n)
1	10
2	19
3	99
4	427
5	1531
6	5031
7	15763
8	47784
9	140586
10	401745
11	1116450
12	3022129
13	7979699
14	20573716
15	51835099
16	127704345
17	307858090
18	726741861
19	1681297548
20	3815152314
21	8498764539
22	18601381870
23	40034714647
24	84794977698
25	176874740063

[10, 19, 99, 427, 1531, 5031, 15763, 47784, 140586, 401745, 1116450, 3022129, 7979699, 20573716, 51835099, 127704345, 307858090, 726741861, 1681297548, 3815152314, 8498764539, 18601381870, 40034714647, 84794977698, 176874740063]

cp's OEIS Frontend

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.

Table of values

List of values