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

1,1

Links

Table of n, a(n) for n=1..22.

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.

Sequence in context: A065297 A067635 A222425 * A003727 A103082 A279111

Adjacent sequences: A222186 A222187 A222188 * A222190 A222191 A222192

Keyword

nonn

Author

N. J. A. Sloane, Feb 12 2013

Extensions

More terms from Michel Marcus, Feb 13 2013

Status

approved