A252830 - cp's OEIS frontend

A252830 Number of n X n nonnegative integer arrays with upper left 0 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.

n	a(n)
1	1
2	5
3	44
4	493
5	6068
6	78674
7	1056756
8	14564701
9	204666202
10	2919462498
11	42143180174
12	614251526864
13	9024782449736
14	133489812361806
15	1985873221687284
16	29689739907869581
17	445797648515664064
18	6719243690952576928

[1, 5, 44, 493, 6068, 78674, 1056756, 14564701, 204666202, 2919462498, 42143180174, 614251526864, 9024782449736, 133489812361806, 1985873221687284, 29689739907869581, 445797648515664064, 6719243690952576928]

cp's OEIS Frontend

A252830 Number of n X n nonnegative integer arrays with upper left 0 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.

Table of values

List of values