A222190 Number of toroidal n X 4 binary arrays, allowing rotation and/or reflection of the rows and/or the columns.

6, 34, 158, 1459, 14676, 184854, 2445918, 33888844, 479268556, 6886509940, 100056170778, 1466749421254, 21657254505396, 321725243553514, 4804133557262316, 72059797641376804, 1085119161923382576, 16397231016301629254, 248546552679488856498

Offset

1,1

Links

Table of n, a(n) for n=1..19.

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: A166941 A086934 A009469 * A304944 A344717 A266359

Adjacent sequences: A222187 A222188 A222189 * A222191 A222192 A222193

Keyword

nonn

Author

N. J. A. Sloane, Feb 12 2013

Extensions

More terms from Michel Marcus, Feb 13 2013

Status

approved