A018811 - cp's OEIS frontend

A018811 Number of lines through exactly 4 points of an n X n grid of points.

n	a(n)
0	0
1	0
2	0
3	0
4	10
5	4
6	4
7	20
8	44
9	36
10	64
11	124
12	200
13	236
14	272
15	308
16	548
17	692
18	852
19	1108
20	1396
21	1452
22	1768
23	2116
24	2496
25	2908
26	3568
27	4292
28	5428
29	5956
30	6500
31	7444
32	8452
33	8980
34	10208
35	11516
36	13348
37	14700
38	16116
39	17596
40	20124
41	22476
42	24956
43	28092
44	31404
45	33052
46	36032

[0, 0, 0, 0, 10, 4, 4, 20, 44, 36, 64, 124, 200, 236, 272, 308, 548, 692, 852, 1108, 1396, 1452, 1768, 2116, 2496, 2908, 3568, 4292, 5428, 5956, 6500, 7444, 8452, 8980, 10208, 11516, 13348, 14700, 16116, 17596, 20124, 22476, 24956, 28092, 31404, 33052, 36032]

cp's OEIS Frontend

A018811 Number of lines through exactly 4 points of an n X n grid of points.

Table of values

List of values