id:A146678 - OEIS Search Results

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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-0111-1100 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 1, 4, 7, 14, 21, 42, 97, 337, 907, 3367, 9291, 36318, 129686, 674043, 2983615, 17944470, 88292506, 606666014, 3595901269, 30553144868, 219341547026 (list; graph; listen)

	OFFSET	`1,9`
	EXAMPLE	`Maximal 9 X 9 example` `.0.0.0.0.1.1.0.0.0` `.0.0.1.1.1.0.0.0.0` `.0.1.0.0.1.1.0.0.0` `.0.1.0.0.0.0.1.0.1` `.1.1.1.0.0.0.1.1.1` `.1.0.1.0.0.0.0.1.0` `.0.0.0.1.1.0.0.1.0` `.0.0.0.0.1.1.1.0.0` `.0.0.0.1.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A147478 A147372 A147440 this_sequence A146417 A008370 A048241` `Adjacent sequences: A146675 A146676 A146677 this_sequence A146679 A146680 A146681`
	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