A250749 - cp's OEIS frontend

A250749 Number of (n+1) X (2+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	72
2	237
3	756
4	2361
5	7272
6	22197
7	67356
8	203601
9	613872
10	1847757
11	5555556
12	16691241
13	50122872
14	150466917
15	451597356
16	1355185281
17	4066342272
18	12200599677
19	36604944756
20	109821125721
21	329475960072
22	988453046037
23	2965409469756

[72, 237, 756, 2361, 7272, 22197, 67356, 203601, 613872, 1847757, 5555556, 16691241, 50122872, 150466917, 451597356, 1355185281, 4066342272, 12200599677, 36604944756, 109821125721, 329475960072, 988453046037, 2965409469756]

cp's OEIS Frontend

A250749 Number of (n+1) X (2+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