A252969 - cp's OEIS frontend

A252969 Number of n X n nonnegative integer arrays with upper left 0 and lower right n+n-5 and value increasing by 0 or 1 with every step right or down.

n	a(n)
1	0
2	0
3	18
4	1236
5	46812
6	1592348
7	54926890
8	1988261908
9	75922639116
10	3044977814280
11	127417950149256
12	5527784646050032
13	247288999212565632
14	11357451257590359840
15	533618856431642996126
16	25573783371050570978268
17	1247199857452953231731592
18	61772272799794134860411162

[0, 0, 18, 1236, 46812, 1592348, 54926890, 1988261908, 75922639116, 3044977814280, 127417950149256, 5527784646050032, 247288999212565632, 11357451257590359840, 533618856431642996126, 25573783371050570978268, 1247199857452953231731592, 61772272799794134860411162]

cp's OEIS Frontend

A252969 Number of n X n nonnegative integer arrays with upper left 0 and lower right n+n-5 and value increasing by 0 or 1 with every step right or down.

Table of values

List of values