A279453 - cp's OEIS frontend

A279453 Triangle read by rows: T(n, k) is the number of nonequivalent ways to place k points on an n X n square grid so that no more than 2 points are on a vertical or horizontal straight line.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	1
9	3
10	8
11	14
12	17
13	9
14	2
15	1
16	3
17	21
18	73
19	202
20	306
21	285
22	115
23	20
24	1
25	6
26	49
27	301
28	1397
29	4361
30	9110
31	11810
32	8679
33	2929
34	288
35	1
36	6
37	93
38	890
39	6582
40	34059
41	126396
42	326190
43	568134
44	624875
45	390426
46	111798
47	8791
48	1
49	10
50	171
51	2321
52	24185
53	185181
54	1055025

[1, 1, 1, 1, 2, 1, 1, 1, 3, 8, 14, 17, 9, 2, 1, 3, 21, 73, 202, 306, 285, 115, 20, 1, 6, 49, 301, 1397, 4361, 9110, 11810, 8679, 2929, 288, 1, 6, 93, 890, 6582, 34059, 126396, 326190, 568134, 624875, 390426, 111798, 8791, 1, 10, 171, 2321, 24185, 185181, 1055025]

cp's OEIS Frontend

A279453 Triangle read by rows: T(n, k) is the number of nonequivalent ways to place k points on an n X n square grid so that no more than 2 points are on a vertical or horizontal straight line.

Table of values

List of values