A250847 - cp's OEIS frontend

A250847 Number of (n+1) X (2+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

n	a(n)
1	400
2	2457
3	13097
4	63631
5	291165
6	1280447
7	5480917
8	23024631
9	95448605
10	391939087
11	1598379237
12	6485763431
13	26220548845
14	105716192127
15	425369781557
16	1709000211031
17	6858576189885
18	27502054979567
19	110211518943877

[400, 2457, 13097, 63631, 291165, 1280447, 5480917, 23024631, 95448605, 391939087, 1598379237, 6485763431, 26220548845, 105716192127, 425369781557, 1709000211031, 6858576189885, 27502054979567, 110211518943877]

cp's OEIS Frontend

A250847 Number of (n+1) X (2+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

Table of values

List of values