id:A147394 - OEIS Search Results

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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111-0001-0001 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 3, 7, 15, 27, 67, 281, 1263, 5491, 23639, 128337, 894617, 7261755, 63564439, 605898697, 6745478781, 88749999709, 1352715152779 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.0.0.0` `.0.0.0.0.1.0.0.0` `.0.0.0.0.1.0.0.0` `.0.0.0.0.1.1.1.1` `.0.1.1.1.0.0.0.1` `.0.0.0.1.0.0.0.1` `.0.0.0.1.0.0.0.0` `.0.0.0.1.1.1.0.0`
	CROSSREFS	`Sequence in context: A139806 A143701 A147638 this_sequence A103021 A025587 A101498` `Adjacent sequences: A147391 A147392 A147393 this_sequence A147395 A147396 A147397`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

AT&T Labs Research