id:A146154 - OEIS Search Results

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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only either as two by three or three by two blocks.

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1

1, 1, 1, 1, 3, 1, 10, 10, 43, 65, 310, 319, 2668, 3017, 34910, 54223, 689528, 1137739, 18655423, 31210424, 700220638, 1365782613, 38696080322, 86209219516, 3066770236798, 7328473794260, 340900040830525, 897917903090606 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.1.1.0.1.1.0.1.1` `.1.1.0.1.1.0.1.1` `.1.1.0.1.1.0.1.1` `.0.0.0.0.0.0.0.0` `.0.0.0.0.0.0.0.0` `.1.1.0.1.1.0.1.1` `.1.1.0.1.1.0.1.1` `.1.1.0.1.1.0.1.1`
	CROSSREFS	`Sequence in context: A052964 A084178 A144697 this_sequence A068438 A064060 A134991` `Adjacent sequences: A146151 A146152 A146153 this_sequence A146155 A146156 A146157`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 27 2008`

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.

AT&T Labs Research