id:A146158 - OEIS Search Results

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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only either as two by three or three by two blocks.

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1

1, 1, 1, 1, 1, 3, 8, 14, 23, 49, 124, 341, 1108, 3645, 13272, 50449, 210792, 970179, 4987095, 27600222, 171681370, 1133281367, 8288847384, 64922838278, 565664086802, 5311135075018, 55657682314667, 624953409635386 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.0.0.0` `.0.0.0.1.1.0.0.0` `.0.0.0.1.1.0.0.0` `.1.1.1.0.0.1.1.1` `.1.1.1.0.0.1.1.1` `.0.0.0.1.1.0.0.0` `.0.0.0.1.1.0.0.0` `.0.0.0.1.1.0.0.0`
	CROSSREFS	`Sequence in context: A098762 A014848 A140479 this_sequence A062354 A135940 A126430` `Adjacent sequences: A146155 A146156 A146157 this_sequence A146159 A146160 A146161`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 27 2008`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

AT&T Labs Research