A250800 - cp's OEIS frontend

A250800 Number of (3+1) X (n+1) 0..1 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

n	a(n)
1	58
2	180
3	482
4	1190
5	2776
6	6230
7	13598
8	29084
9	61274
10	127630
11	263544
12	540558
13	1102982
14	2241420
15	4540290
16	9173622
17	18497880
18	37239590
19	74873806
20	150386236
21	301805898
22	605284030
23	1213273912
24	2430926110
25	4868936566
26	9749335980

[58, 180, 482, 1190, 2776, 6230, 13598, 29084, 61274, 127630, 263544, 540558, 1102982, 2241420, 4540290, 9173622, 18497880, 37239590, 74873806, 150386236, 301805898, 605284030, 1213273912, 2430926110, 4868936566, 9749335980]

cp's OEIS Frontend

A250800 Number of (3+1) X (n+1) 0..1 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

Table of values

List of values