id:A146287 - OEIS Search Results

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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 111-110-111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 13, 49, 205, 661, 1997, 13307, 88591, 614455, 6581035, 95397503, 1522572859, 23440615715, 367710019427, 8011532526037, 207007785752989, 6626542824985383 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.1.1.1` `.1.1.1.0.0.0.1.1` `.1.1.0.0.0.1.1.1` `.1.1.1.0.0.0.0.0` `.0.0.0.0.0.1.1.1` `.1.1.1.0.0.0.1.1` `.1.1.0.0.0.1.1.1` `.1.1.1.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A044496 A158480 A009951 this_sequence A147346 A147452 A146782` `Adjacent sequences: A146284 A146285 A146286 this_sequence A146288 A146289 A146290`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

AT&T Labs Research