A195278 - cp's OEIS frontend

A195278 T(n,k) = Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by k or less and triangles differing by a constant counted only once.

n	a(n)
1	1
2	1
3	9
4	1
5	25
6	171
7	1
8	49
9	2125
10	6939
11	1
12	81
13	11319
14	626525
15	609309
16	1
17	121
18	39609
19	12608631
20	649112125
21	116330103
22	1
23	169
24	107811
25	119743353
26	68604760497
27	2375645170875
28	48439766655
29	1
30	225
31	248261
32	724789395
33	2266745635377

[1, 1, 9, 1, 25, 171, 1, 49, 2125, 6939, 1, 81, 11319, 626525, 609309, 1, 121, 39609, 12608631, 649112125, 116330103, 1, 169, 107811, 119743353, 68604760497, 2375645170875, 48439766655, 1, 225, 248261, 724789395, 2266745635377]

cp's OEIS Frontend

A195278 T(n,k) = Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by k or less and triangles differing by a constant counted only once.

Table of values

List of values