A250522 - cp's OEIS frontend

A250522 Number of (n+1)X(3+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction.

n	a(n)
1	867
2	5029
3	21955
4	82023
5	279161
6	896191
7	2771901
8	8374485
9	24944039
10	73714737
11	217061167
12	638657339
13	1880873517
14	5549684027
15	16412416857
16	48651910233
17	144539853387
18	430255351197
19	1282888681851
20	3830445412591
21	11449627377217

[867, 5029, 21955, 82023, 279161, 896191, 2771901, 8374485, 24944039, 73714737, 217061167, 638657339, 1880873517, 5549684027, 16412416857, 48651910233, 144539853387, 430255351197, 1282888681851, 3830445412591, 11449627377217]

cp's OEIS Frontend

A250522 Number of (n+1)X(3+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction.

Table of values

List of values