id:A146236 - OEIS Search Results

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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 110-111-001 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 9, 17, 33, 89, 333, 849, 5379, 20923, 147329, 704405, 5858399, 36340527, 403495741, 3132269377, 47135996775, 474369570793, 8861603100211, 114644138972971 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.1.1.0.0` `.0.0.0.0.1.1.0.0` `.0.0.0.1.1.0.1.1` `.0.0.1.0.0.1.1.1` `.1.1.1.0.0.1.0.0` `.1.1.0.1.1.0.0.0` `.0.0.1.1.0.0.0.0` `.0.0.1.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A164887 A111733 A127193 this_sequence A147279 A097478 A147026` `Adjacent sequences: A146233 A146234 A146235 this_sequence A146237 A146238 A146239`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

AT&T Labs Research