A252825 - cp's OEIS frontend

A252825 Number of nX5 nonnegative integer arrays with upper left 0 and every value within 3 of its city block distance from the upper left and every value increasing by 0 or 1 with every step right or down.

n	a(n)
1	15
2	142
3	1238
4	9075
5	54376
6	271846
7	1165921
8	4396009
9	14863460
10	45791493
11	130210765
12	345350438
13	861722537
14	2037396931
15	4591832266
16	9915068062
17	20600380173
18	41336047432
19	80360448168
20	151781791285
21	279198974102

[15, 142, 1238, 9075, 54376, 271846, 1165921, 4396009, 14863460, 45791493, 130210765, 345350438, 861722537, 2037396931, 4591832266, 9915068062, 20600380173, 41336047432, 80360448168, 151781791285, 279198974102]

cp's OEIS Frontend

A252825 Number of nX5 nonnegative integer arrays with upper left 0 and every value within 3 of its city block distance from the upper left and every value increasing by 0 or 1 with every step right or down.

Table of values

List of values