A250784 - cp's OEIS frontend

A250784 Number of (2+1) X (n+1) 0..1 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	18
2	46
3	106
4	238
5	518
6	1106
7	2326
8	4838
9	9978
10	20446
11	41686
12	84658
13	171398
14	346166
15	697786
16	1404398
17	2823078
18	5669266
19	11375926
20	22812358
21	45722618
22	91603646
23	183463606
24	367341938
25	735354918
26	1471795606
27	2945348026
28	5893538638

[18, 46, 106, 238, 518, 1106, 2326, 4838, 9978, 20446, 41686, 84658, 171398, 346166, 697786, 1404398, 2823078, 5669266, 11375926, 22812358, 45722618, 91603646, 183463606, 367341938, 735354918, 1471795606, 2945348026, 5893538638]

cp's OEIS Frontend

A250784 Number of (2+1) X (n+1) 0..1 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