A219885 - cp's OEIS frontend

A219885 Number of 4Xn arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 4Xn array.

n	a(n)
1	15
2	46
3	146
4	621
5	2190
6	6965
7	21035
8	60891
9	171009
10	465323
11	1225425
12	3124293
13	7723032
14	18545881
15	43355303
16	98866072
17	220320615
18	480589189
19	1027625310
20	2156754843
21	4448124037
22	9024377209
23	18027331364
24	35488683485
25	68901443927

[15, 46, 146, 621, 2190, 6965, 21035, 60891, 171009, 465323, 1225425, 3124293, 7723032, 18545881, 43355303, 98866072, 220320615, 480589189, 1027625310, 2156754843, 4448124037, 9024377209, 18027331364, 35488683485, 68901443927]

cp's OEIS Frontend

A219885 Number of 4Xn arrays of the minimum value of corresponding elements and their horizontal, diagonal 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