A368144 - cp's OEIS frontend

A368144 Number of ways of tiling the n X n torus up to 90-degree rotations of the square by a tile that is fixed only under 180-degree rotation of the square.

n	a(n)
1	1
2	4
3	24
4	1155
5	337600
6	477339104
7	2872202028544
8	72057595967327280
9	7462505059899321934848
10	3169126500571074529208754688
11	5492677668532710795071525279789056
12	38716571525226776289479030777851808143360
13	1106936151351216411420552029913564174524281470976

[1, 4, 24, 1155, 337600, 477339104, 2872202028544, 72057595967327280, 7462505059899321934848, 3169126500571074529208754688, 5492677668532710795071525279789056, 38716571525226776289479030777851808143360, 1106936151351216411420552029913564174524281470976]

cp's OEIS Frontend

A368144 Number of ways of tiling the n X n torus up to 90-degree rotations of the square by a tile that is fixed only under 180-degree rotation of the square.

Table of values

List of values