id:A146415 - 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 in a 1000-1111-1000 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 1, 18, 9, 192, 29, 1571, 137, 16589, 1117, 263101, 13601, 7736259, 257342, 336101213, 6436423, 19847949792, 229848194 (list; graph; listen)

	OFFSET	`1,9`
	EXAMPLE	`Maximal 9 X 9 example` `.0.1.0.1.1.1.0.1.0` `.0.1.0.0.1.0.0.1.0` `.0.1.0.0.1.0.0.1.0` `.1.1.1.0.1.0.1.1.1` `.0.0.0.0.0.0.0.0.0` `.1.1.1.0.1.0.1.1.1` `.0.1.0.0.1.0.0.1.0` `.0.1.0.0.1.0.0.1.0` `.0.1.0.1.1.1.0.1.0`
	CROSSREFS	`Sequence in context: A146676 A147438 A033965 this_sequence A089517 A035616 A033668` `Adjacent sequences: A146412 A146413 A146414 this_sequence A146416 A146417 A146418`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

AT&T Labs Research