id:A146254 - OEIS Search Results

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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 110-111-011 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 3, 11, 15, 27, 47, 153, 311, 1151, 2849, 13187, 36901, 183137, 600651, 3599693, 14056563, 100844845, 464890609, 3938830471, 21240835037, 209440142193, 1329357548469, 15466899531131, 115875805461919 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.1.1.0` `.1.1.0.0.1.1.1.0` `.1.1.1.0.1.1.0.0` `.0.1.1.0.0.0.0.0` `.0.0.0.0.0.1.1.0` `.0.0.1.1.0.1.1.1` `.0.1.1.1.0.0.1.1` `.0.1.1.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A060698 A046159 A022410 this_sequence A039503 A158507 A030765` `Adjacent sequences: A146251 A146252 A146253 this_sequence A146255 A146256 A146257`
	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