A253003 - cp's OEIS frontend

A253003 Number of nX7 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value within 3 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	20
2	140
3	1028
4	7235
5	39758
6	122833
7	122833
8	4915726
9	59154789
10	329035981
11	1124010769
12	2853903059
13	5973571711
14	10950733467
15	18255251895
16	28357151187
17	41726455535
18	58833189131
19	80147376167
20	106139040835
21	137278207327

[20, 140, 1028, 7235, 39758, 122833, 122833, 4915726, 59154789, 329035981, 1124010769, 2853903059, 5973571711, 10950733467, 18255251895, 28357151187, 41726455535, 58833189131, 80147376167, 106139040835, 137278207327]

cp's OEIS Frontend

A253003 Number of nX7 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value within 3 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