A331453 - cp's OEIS frontend

A331453 Triangle read by rows: T(n,m) (n >= m >= 1) = number of vertices formed by drawing the lines connecting any two of the 2*(m+n) perimeter points of an m X n grid of squares.

n	a(n)
1	5
2	13
3	37
4	35
5	99
6	257
7	75
8	213
9	421
10	817
11	159
12	401
13	881
14	1489
15	2757
16	275
17	657
18	1305
19	2143
20	3555
21	4825
22	477
23	1085
24	2131
25	3431
26	5821
27	7663
28	12293
29	755
30	1619
31	2941
32	4817
33	7477
34	9913
35	15037
36	19241
37	1163
38	2327
39	4369
40	6495
41	10393
42	13647
43	20425
44	24651
45	33549
46	1659
47	3257
48	5603
49	8637
50	13689
51	16953
52	25125
53	30779
54	39857
55	49577

[5, 13, 37, 35, 99, 257, 75, 213, 421, 817, 159, 401, 881, 1489, 2757, 275, 657, 1305, 2143, 3555, 4825, 477, 1085, 2131, 3431, 5821, 7663, 12293, 755, 1619, 2941, 4817, 7477, 9913, 15037, 19241, 1163, 2327, 4369, 6495, 10393, 13647, 20425, 24651, 33549, 1659, 3257, 5603, 8637, 13689, 16953, 25125, 30779, 39857, 49577]

cp's OEIS Frontend

A331453 Triangle read by rows: T(n,m) (n >= m >= 1) = number of vertices formed by drawing the lines connecting any two of the 2*(m+n) perimeter points of an m X n grid of squares.

Table of values

List of values