A250669 - cp's OEIS frontend

A250669 Number of (n+1)X(1+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

n	a(n)
1	104
2	520
3	2512
4	11736
5	53032
6	233300
7	1005121
8	4260728
9	17835379
10	73930174
11	304111433
12	1243471948
13	5060483311
14	20518170938
15	82950532885
16	334582615528
17	1347111707003
18	5416107760342
19	21751360774177
20	87278063198468

[104, 520, 2512, 11736, 53032, 233300, 1005121, 4260728, 17835379, 73930174, 304111433, 1243471948, 5060483311, 20518170938, 82950532885, 334582615528, 1347111707003, 5416107760342, 21751360774177, 87278063198468]

cp's OEIS Frontend

A250669 Number of (n+1)X(1+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

Table of values

List of values