A250855 - cp's OEIS frontend

A250855 Number of (3+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

n	a(n)
1	2670
2	13097
3	44797
4	123016
5	290646
6	614965
7	1195457
8	2172712
9	3738406
10	6146361
11	9724685
12	14888992
13	22156702
14	32162421
15	45674401
16	63612080
17	87064702
18	117311017
19	155840061
20	204373016
21	264886150
22	339634837
23	431178657
24	542407576
25	676569206

[2670, 13097, 44797, 123016, 290646, 614965, 1195457, 2172712, 3738406, 6146361, 9724685, 14888992, 22156702, 32162421, 45674401, 63612080, 87064702, 117311017, 155840061, 204373016, 264886150, 339634837, 431178657, 542407576, 676569206]

cp's OEIS Frontend

A250855 Number of (3+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

Table of values

List of values