A222189 Number of toroidal n X 3 binary arrays, allowing rotation and/or reflection of the rows and/or the columns.

4, 13, 36, 158, 708, 4236, 26412, 180070, 1256914, 8999762, 65225244, 477772294, 3525803320, 26185264801, 195490126328, 1466095545930, 11038514989344, 83401050695432, 632087998742988, 4803854169636124, 36600736833265244, 279496328812771427

Offset: 1

Author

N. J. A. Sloane, Feb 12 2013

Keywords

• nonn

Links

• S. N. Ethier, Counting toroidal binary arrays, arXiv preprint arXiv:1301.2352, 2013 and J. Int. Seq. 16 (2013) #13.4.7.

Crossrefs

A column of A222188.

Extensions

More terms from Michel Marcus, Feb 13 2013