id:A146624 - 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 1001-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 7, 15, 27, 59, 155, 405, 1359, 4729, 17093, 68787, 322325, 1555247, 8826433, 52320689, 346500913, 2442891583, 19699289407, 167408986709, 1625563585505 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.1.1.0` `.1.0.0.1.0.1.0.0` `.1.1.1.1.0.1.0.0` `.0.0.0.0.0.1.1.0` `.0.1.1.0.0.0.0.0` `.0.0.1.0.1.1.1.1` `.0.0.1.0.1.0.0.1` `.0.1.1.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A154935 A012480 A063611 this_sequence A006188 A139597 A117747` `Adjacent sequences: A146621 A146622 A146623 this_sequence A146625 A146626 A146627`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

AT&T Labs Research