A250722 - cp's OEIS frontend

A250722 Number of (n+1) X (n+1) 0..1 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	9
2	46
3	208
4	885
5	3605
6	14437
7	57397
8	228455
9	912438
10	3661515
11	14755226
12	59674645
13	241996099
14	983339540
15	4001469252
16	16299591564
17	66441841973
18	270971703338
19	1105502740041
20	4511347592849
21	18413367334909
22	75165710188419

[9, 46, 208, 885, 3605, 14437, 57397, 228455, 912438, 3661515, 14755226, 59674645, 241996099, 983339540, 4001469252, 16299591564, 66441841973, 270971703338, 1105502740041, 4511347592849, 18413367334909, 75165710188419]

cp's OEIS Frontend

A250722 Number of (n+1) X (n+1) 0..1 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