A292156 - cp's OEIS frontend

A292156 Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square grid such that the picked positions have a line symmetry but no point symmetry.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	36
7	0
8	0
9	168
10	220
11	0
12	0
13	524
14	944
15	1960
16	0
17	0
18	1292
19	2848
20	6752
21	15752
22	0
23	0
24	2736
25	7248
26	20280
27	55904
28	120212
29	0
30	0
31	5088
32	15576
33	48576
34	156224
35	378824
36	1068008

[0, 0, 0, 0, 0, 36, 0, 0, 168, 220, 0, 0, 524, 944, 1960, 0, 0, 1292, 2848, 6752, 15752, 0, 0, 2736, 7248, 20280, 55904, 120212, 0, 0, 5088, 15576, 48576, 156224, 378824, 1068008]

cp's OEIS Frontend

A292156 Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square grid such that the picked positions have a line symmetry but no point symmetry.

Table of values

List of values