A336174 - cp's OEIS frontend

A336174 Number of non-symmetric binary n X n matrices M over the reals such that M^2 is the transpose of M.

n	a(n)
0	0
1	0
2	0
3	2
4	16
5	80
6	360
7	1680
8	8064
9	39872
10	209920
11	1168640
12	6779520
13	41403648
14	265434624
15	1765487360
16	12227461120
17	88163164160
18	656547803136
19	5054718763008
20	40261284495360
21	330010833797120
22	2783003768258560
23	24166721457815552
24	215318925878132736
25	1966855934150246400

[0, 0, 0, 2, 16, 80, 360, 1680, 8064, 39872, 209920, 1168640, 6779520, 41403648, 265434624, 1765487360, 12227461120, 88163164160, 656547803136, 5054718763008, 40261284495360, 330010833797120, 2783003768258560, 24166721457815552, 215318925878132736, 1966855934150246400]

cp's OEIS Frontend

A336174 Number of non-symmetric binary n X n matrices M over the reals such that M^2 is the transpose of M.

Table of values

List of values