A219687 - cp's OEIS frontend

A219687 Number of 3 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..2 3 X n array.

n	a(n)
1	6
2	9
3	31
4	87
5	208
6	452
7	922
8	1799
9	3394
10	6234
11	11196
12	19713
13	34085
14	57937
15	96878
16	159429
17	258304
18	412146
19	647840
20	1003547
21	1532627
22	2308645
23	3431682
24	5036203
25	7300766
26	10459890
27	14818436
28	20768893
29	28812001
30	39581185
31	53871318
32	72672377

[6, 9, 31, 87, 208, 452, 922, 1799, 3394, 6234, 11196, 19713, 34085, 57937, 96878, 159429, 258304, 412146, 647840, 1003547, 1532627, 2308645, 3431682, 5036203, 7300766, 10459890, 14818436, 20768893, 28812001, 39581185, 53871318, 72672377]

cp's OEIS Frontend

A219687 Number of 3 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..2 3 X n array.

Table of values

List of values