A288187 - cp's OEIS frontend

A288187 Triangle read by rows: T(n,m) (n >= m >= 1) = number of chambers (or regions) formed by drawing the line segments connecting any two of the (n+1) X (m+1) lattice points in an n X m lattice polygon.

n	a(n)
1	4
2	16
3	56
4	46
5	176
6	520
7	104
8	388
9	1152
10	2584
11	214
12	822
13	2502
14	5700
15	12368
16	380
17	1452
18	4392
19	9944
20	21504
21	37400
22	648
23	2516
24	7644
25	17380
26	37572
27	65810
28	115532
29	1028
30	3952
31	12120
32	27572
33	59784
34	105128
35	184442
36	294040
37	1562
38	6060
39	18476
40	42066
41	91654
42	161352
43	282754
44	450864
45	690816

[4, 16, 56, 46, 176, 520, 104, 388, 1152, 2584, 214, 822, 2502, 5700, 12368, 380, 1452, 4392, 9944, 21504, 37400, 648, 2516, 7644, 17380, 37572, 65810, 115532, 1028, 3952, 12120, 27572, 59784, 105128, 184442, 294040, 1562, 6060, 18476, 42066, 91654, 161352, 282754, 450864, 690816]

cp's OEIS Frontend

A288187 Triangle read by rows: T(n,m) (n >= m >= 1) = number of chambers (or regions) formed by drawing the line segments connecting any two of the (n+1) X (m+1) lattice points in an n X m lattice polygon.

Table of values

List of values