A250801 - cp's OEIS frontend

A250801 Number of (4+1) X (n+1) 0..1 arrays with nondecreasing min(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	140
2	490
3	1430
4	3776
5	9258
6	21610
7	48600
8	106426
9	228342
10	482496
11	1007546
12	2084962
13	4284032
14	8754018
15	17810278
16	36111264
17	73018218
18	147325946
19	296740456
20	596862762
21	1199199990
22	2407260800
23	4828861690
24	9680929586
25	19399411088

[140, 490, 1430, 3776, 9258, 21610, 48600, 106426, 228342, 482496, 1007546, 2084962, 4284032, 8754018, 17810278, 36111264, 73018218, 147325946, 296740456, 596862762, 1199199990, 2407260800, 4828861690, 9680929586, 19399411088]

cp's OEIS Frontend

A250801 Number of (4+1) X (n+1) 0..1 arrays with nondecreasing min(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