A252819 - cp's OEIS frontend

A252819 Number of nX7 nonnegative integer arrays with upper left 0 and every value within 2 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	22
2	246
3	2067
4	13015
5	65711
6	279300
7	1033761
8	3414257
9	10248688
10	28359679
11	73160199
12	177550620
13	408377425
14	895696589
15	1883020893
16	3810974274
17	7452779978
18	14128342036
19	26035049083
20	46748705613
21	81968236755
22	140604294490

[22, 246, 2067, 13015, 65711, 279300, 1033761, 3414257, 10248688, 28359679, 73160199, 177550620, 408377425, 895696589, 1883020893, 3810974274, 7452779978, 14128342036, 26035049083, 46748705613, 81968236755, 140604294490]

cp's OEIS Frontend

A252819 Number of nX7 nonnegative integer arrays with upper left 0 and every value within 2 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