A211916 - cp's OEIS frontend

A211916 T(n,k)=Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-k-1.

n	a(n)
1	0
2	0
3	1
4	0
5	1
6	6
7	0
8	0
9	10
10	25
11	0
12	0
13	10
14	214
15	70
16	0
17	0
18	10
19	802
20	1946
21	156
22	0
23	0
24	10
25	1492
26	27963
27	10431
28	301
29	0
30	0
31	0
32	1732
33	227388
34	394117
35	40561
36	526
37	0
38	0
39	0
40	1744
41	1085432
42	9345480
43	3243531
44	127275
45	855
46	0
47	0
48	0
49	1744
50	3104732
51	146208485
52	172044141

[0, 0, 1, 0, 1, 6, 0, 0, 10, 25, 0, 0, 10, 214, 70, 0, 0, 10, 802, 1946, 156, 0, 0, 10, 1492, 27963, 10431, 301, 0, 0, 0, 1732, 227388, 394117, 40561, 526, 0, 0, 0, 1744, 1085432, 9345480, 3243531, 127275, 855, 0, 0, 0, 1744, 3104732, 146208485, 172044141]

cp's OEIS Frontend

A211916 T(n,k)=Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-k-1.

Table of values

List of values