A250791 - cp's OEIS frontend

A250791 Number of (n+1) X (2+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	24
2	66
3	180
4	490
5	1336
6	3646
7	9956
8	27194
9	74288
10	202950
11	554460
12	1514802
13	4138504
14	11306590
15	30890164
16	84393482
17	230567264
18	629921462
19	1720977420
20	4701797730
21	12845550264
22	35094695950
23	95880492388
24	261950376634
25	715661738000

[24, 66, 180, 490, 1336, 3646, 9956, 27194, 74288, 202950, 554460, 1514802, 4138504, 11306590, 30890164, 84393482, 230567264, 629921462, 1720977420, 4701797730, 12845550264, 35094695950, 95880492388, 261950376634, 715661738000]

cp's OEIS Frontend

A250791 Number of (n+1) X (2+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