A253217 - cp's OEIS frontend

A253217 Number of n X n nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 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	0
2	0
3	1
4	19
5	268
6	3568
7	47698
8	649712
9	9023385
10	127419681
11	1823918697
12	26398702645
13	385582981615
14	5674890516295
15	84060883775765
16	1252066289632643
17	18738613233957420
18	281620474177057788
19	4248088188086420832

[0, 0, 1, 19, 268, 3568, 47698, 649712, 9023385, 127419681, 1823918697, 26398702645, 385582981615, 5674890516295, 84060883775765, 1252066289632643, 18738613233957420, 281620474177057788, 4248088188086420832]

cp's OEIS Frontend

A253217 Number of n X n nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 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