id:A146742 - 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 1110-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 3, 7, 15, 27, 47, 131, 579, 2405, 9787, 35829, 162637, 924049, 6701259, 48977223, 381859081, 3048055139, 30000129347 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.1.0.0` `.0.0.1.1.1.1.0.0` `.0.1.0.0.0.0.1.1` `.1.1.0.0.0.0.1.1` `.1.1.0.0.0.0.1.1` `.1.1.0.0.0.0.1.0` `.0.0.1.1.1.1.0.0` `.0.0.1.1.1.0.0.0`
	CROSSREFS	`Sequence in context: A001649 A001276 A097080 this_sequence A146425 A147595 A147127` `Adjacent sequences: A146739 A146740 A146741 this_sequence A146743 A146744 A146745`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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