id:A146625 - 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 1001-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 9, 17, 43, 177, 951, 5185, 35811, 267203, 2640609, 29564643, 461890027, 7371309815, 158387025739, 3708738153141 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.1.0.0.0.0` `.1.1.0.1.0.0.0.0` `.1.0.0.1.0.0.0.0` `.1.0.1.1.0.0.1.1` `.1.1.0.0.1.1.0.1` `.0.0.0.0.1.0.0.1` `.0.0.0.0.1.0.1.1` `.0.0.0.0.1.1.0.0`
	CROSSREFS	`Sequence in context: A147082 A145941 A147245 this_sequence A146576 A147138 A101304` `Adjacent sequences: A146622 A146623 A146624 this_sequence A146626 A146627 A146628`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.