id:A146270 - 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 110-111-110 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 8, 19, 32, 51, 140, 477, 1662, 6189, 24619, 109450, 533450, 2859993, 16886952, 110380054, 797354362, 6460189913, 58366269898, 572562441744, 6143132227217, 72768344185209 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.1.1.0.0` `.0.1.0.0.1.1.1.0` `.1.1.1.0.1.1.0.0` `.1.1.1.0.0.0.0.0` `.0.0.0.0.0.1.1.1` `.0.0.1.1.0.1.1.1` `.0.1.1.1.0.0.1.0` `.0.0.1.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A081968 A076096 A017485 this_sequence A146222 A140672 A135027` `Adjacent sequences: A146267 A146268 A146269 this_sequence A146271 A146272 A146273`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

AT&T Labs Research