A250686 - cp's OEIS frontend

A250686 Number of (n+1) X (3+1) 0..3 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	2541
2	13906
3	74631
4	383440
5	1848953
6	8474002
7	37322413
8	159438246
9	665575403
10	2731006288
11	11064772389
12	44421077632
13	177194842907
14	703795289106
15	2787900969927
16	11027407758154
17	43593798115489
18	172349301152440

[2541, 13906, 74631, 383440, 1848953, 8474002, 37322413, 159438246, 665575403, 2731006288, 11064772389, 44421077632, 177194842907, 703795289106, 2787900969927, 11027407758154, 43593798115489, 172349301152440]

cp's OEIS Frontend

A250686 Number of (n+1) X (3+1) 0..3 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