A250777 - cp's OEIS frontend

A250777 Number of (n+1) X (2+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	21
2	46
3	96
4	196
5	396
6	796
7	1596
8	3196
9	6396
10	12796
11	25596
12	51196
13	102396
14	204796
15	409596
16	819196
17	1638396
18	3276796
19	6553596
20	13107196
21	26214396
22	52428796
23	104857596
24	209715196
25	419430396
26	838860796
27	1677721596
28	3355443196

[21, 46, 96, 196, 396, 796, 1596, 3196, 6396, 12796, 25596, 51196, 102396, 204796, 409596, 819196, 1638396, 3276796, 6553596, 13107196, 26214396, 52428796, 104857596, 209715196, 419430396, 838860796, 1677721596, 3355443196]

cp's OEIS Frontend

A250777 Number of (n+1) X (2+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