A288180 - cp's OEIS frontend

A288180 Number of intersection points formed by drawing the line segments connecting any two lattice points of an n X m convex lattice polygon written as triangle T(n,m), n >= 1, 1 <= m <= n.

n	a(n)
1	5
2	13
3	37
4	35
5	121
6	353
7	75
8	265
9	771
10	1761
11	159
12	587
13	1755
14	4039
15	8917
16	275
17	1019
18	3075
19	7035
20	15419
21	26773
22	477
23	1797
24	5469
25	12495
26	27229
27	47685
28	84497
29	755
30	2823
31	8693
32	19831
33	43333
34	76357
35	135075
36	215545
37	1163
38	4369
39	13301
40	30333
41	66699
42	117719
43	207643
44	331233
45	508613

[5, 13, 37, 35, 121, 353, 75, 265, 771, 1761, 159, 587, 1755, 4039, 8917, 275, 1019, 3075, 7035, 15419, 26773, 477, 1797, 5469, 12495, 27229, 47685, 84497, 755, 2823, 8693, 19831, 43333, 76357, 135075, 215545, 1163, 4369, 13301, 30333, 66699, 117719, 207643, 331233, 508613]

cp's OEIS Frontend

A288180 Number of intersection points formed by drawing the line segments connecting any two lattice points of an n X m convex lattice polygon written as triangle T(n,m), n >= 1, 1 <= m <= n.

Table of values

List of values