id:A147267 - 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 0100-1100-0111-0001 pattern in any orientation.

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1, 1, 1, 1, 1, 1, 1, 3, 27, 51, 87, 231, 993, 2999, 11701, 48597, 296399, 1545465, 9380053, 56658941, 454413807 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.0.1.1.0.0` `.0.0.1.1.0.1.0.0` `.1.1.1.0.0.1.1.1` `.1.0.0.0.0.0.1.0` `.0.1.0.0.0.0.0.1` `.1.1.1.0.0.1.1.1` `.0.0.1.0.1.1.0.0` `.0.0.1.1.0.1.0.0`
	CROSSREFS	`Sequence in context: A032418 A108163 A108114 this_sequence A071183 A025414 A053360` `Adjacent sequences: A147264 A147265 A147266 this_sequence A147268 A147269 A147270`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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