id:A146184 - 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 110-111-100 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 3, 9, 19, 33, 87, 301, 1337, 5927, 24359, 118543, 715115, 5164241, 42357883, 353625469, 3347092839, 36905312969, 482588953149, 7069762004523, 114903134718451 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.1.0.0.0` `.0.0.1.1.1.0.0.0` `.0.1.0.1.1.0.0.0` `.0.1.1.0.0.1.1.1` `.1.1.1.0.0.1.1.0` `.0.0.0.1.1.0.1.0` `.0.0.0.1.1.1.0.0` `.0.0.0.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A146401 A146465 A147119 this_sequence A155274 A058058 A062748` `Adjacent sequences: A146181 A146182 A146183 this_sequence A146185 A146186 A146187`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 27 2008`

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.

AT&T Labs Research