id:A146219 - 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 101-111-010 pattern in any orientation.

+0
1

1, 1, 1, 1, 3, 9, 20, 63, 272, 1557, 10412, 77761, 729051, 8641753, 126757272, 2289847876, 50015283552, 1327280079169, 43398915228962, 1753679030593542, 87293853894564783, 5311141506545315135, 394710940436034575590 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.0.0.0` `.0.0.1.1.0.0.0.0` `.0.1.0.1.1.0.0.0` `.1.1.1.0.0.1.0.1` `.1.0.1.0.0.1.1.1` `.0.0.0.1.1.0.1.0` `.0.0.0.0.1.1.0.0` `.0.0.0.1.1.0.0.0`
	CROSSREFS	`Sequence in context: A147387 A146267 A151420 this_sequence A128127 A006077 A109612` `Adjacent sequences: A146216 A146217 A146218 this_sequence A146220 A146221 A146222`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research