id:A146031 - OEIS Search Results

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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 3X3 el 1,1 1,2 1,3 2,3 3,3 in any orientation.

+0
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1, 1, 1, 1, 1, 1, 47, 87, 827, 1813, 23847, 61833, 1905275, 6035973, 614447855, 2474833329, 318082536355, 1576923345267, 332168016129555, 2011400450726835, 916006897110162895, 6848186045213206995, 6424521065702879448173 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.1.1.1.0.0.1.1.1` `.1.0.0.0.0.0.0.1` `.1.0.0.0.0.0.0.1` `.0.0.0.0.0.0.0.0` `.0.0.0.0.0.0.0.0` `.1.0.0.0.0.0.0.1` `.1.0.0.0.0.0.0.1` `.1.1.1.0.0.1.1.1`
	CROSSREFS	`Sequence in context: A132255 A142041 A033232 this_sequence A139968 A132451 A004943` `Adjacent sequences: A146028 A146029 A146030 this_sequence A146032 A146033 A146034`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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Last modified November 25 13:47 EST 2009. Contains 167481 sequences.

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