A250807 - cp's OEIS frontend

A250807 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 min(x(i,j),x(i-1,j)) in the j direction.

n	a(n)
1	225
2	873
3	3081
4	10233
5	32745
6	102393
7	315561
8	963513
9	2924265
10	8840313
11	26656041
12	80238393
13	241255785
14	724848633
15	2176708521
16	6534450873
17	19612003305
18	58853311353
19	176594537001
20	529852816953
21	1589696862825
22	4769367412473

[225, 873, 3081, 10233, 32745, 102393, 315561, 963513, 2924265, 8840313, 26656041, 80238393, 241255785, 724848633, 2176708521, 6534450873, 19612003305, 58853311353, 176594537001, 529852816953, 1589696862825, 4769367412473]

cp's OEIS Frontend

A250807 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 min(x(i,j),x(i-1,j)) in the j direction.

Table of values

List of values