A252826 - cp's OEIS frontend

A252826 Number of nX6 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	26
2	339
3	3891
4	36292
5	271846
6	1679072
7	8807722
8	40232545
9	163307844
10	598768118
11	2009666884
12	6242686351
13	18111918515
14	49456857086
15	127928520595
16	315195592486
17	743219906659
18	1684034391078
19	3679765581966
20	7778027858175
21	15947032415637

[26, 339, 3891, 36292, 271846, 1679072, 8807722, 40232545, 163307844, 598768118, 2009666884, 6242686351, 18111918515, 49456857086, 127928520595, 315195592486, 743219906659, 1684034391078, 3679765581966, 7778027858175, 15947032415637]

cp's OEIS Frontend

A252826 Number of nX6 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