id:A147229 - 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 11011-01110 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 4, 9, 18, 29, 62, 159, 552, 1625, 6033, 18370, 76478, 293679, 1560810, 7445670, 46344151, 251751509, 1816985360, 11749000262 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.1.0.0` `.0.1.1.1.0.1.1.0` `.1.1.0.1.1.0.1.0` `.0.0.1.0.0.1.1.0` `.0.1.1.0.0.1.0.0` `.0.1.0.1.1.0.1.1` `.0.1.1.0.1.1.1.0` `.0.0.1.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A008021 A103976 A036695 this_sequence A008149 A008025 A008020` `Adjacent sequences: A147226 A147227 A147228 this_sequence A147230 A147231 A147232`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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

AT&T Labs Research